# List of Latin phrases (O)

This page is one of a series listing English translations of notable Latin phrases, such as veni, vidi, vici and et cetera. Some of the phrases are themselves translations of Greek phrases, as ancient Greek rhetoric and literature started centuries before the beginning of Latin literature in ancient Rome.
    This list covers the letter O. See List of Latin phrases for the main list.

## Lists of Latin phrases

* A
* B
* C
* D
* E
* F
* G
* H
* I
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* full
| Latin | Translation | Notes |
| O Deus ego amo te | O God I Love You | attributed to Saint Francis Xavier |
| O fortunatos nimium sua si bona norint, agricolas | The farmers would count themselves lucky, if only they knew how good they had it | from Virgil in Georgics II, 458 |
| o homines ad servitutem paratos | Men ready to be slaves! | attributed (in Tacitus, Annales, III, 65) to the Roman Emperor Tiberius, in disgust at the servile attitude of Roman senators; said of those who should be leaders but instead slavishly follow the lead of others |
| O tempora, o mores! | Oh, the times! Oh, the morals! | also translated "What times! What customs!"; from Cicero, Catilina I, 2 |
| O Tite tute Tati tibi tanta tyranne tulisti | O tyrant Titus Tatius, what terrible calamities you brought onto yourself! | from Quintus Ennius, Annales (104), considered an example of a Latin tongue-twister |
| Obedientia civium urbis felicitas | The obedience of the citizens makes us a happy city | Motto of Dublin |
| obiit (ob.) | one died | "He/she died", inscription on gravestones; ob. also sometimes stands for obiter (in passing or incidentally) |
| obit anis, abit onus | The old woman dies, the burden is lifted | Arthur Schopenhauer |
| obit caeleps | Ob. Cael. or died a bachelor (implying no legitimate offspring ever existed to inherit, cf. d.s.p., d.s.p.s. and d.s.p.m.) | Heraldic visitation or County Visitation Books for England |
| obiter dictum | a thing said in passing | in law, an observation by a judge on some point of law not directly relevant to the case before him, and thus neither requiring his decision nor serving as a precedent, but nevertheless of persuasive authority. In general, any comment, remark or observation made in passing |
| obliti privatorum, publica curate | Forget private affairs, take care of public ones | Roman political saying which reminds that common good should be given priority over private matters for any person having a responsibility in the State |
| obscuris vera involvens | the truth being enveloped by obscure things | from Virgil |
| obscurum per obscurius | the obscure by means of the more obscure | An explanation that is less clear than what it tries to explain; synonymous with ignotum per ignotius |
| obtineo et teneo | to obtain and to keep | motto |
| obtorto collo | with a twisted neck | unwillingly |
| oculus dexter (O.D.) | right eye | Ophthalmologist shorthand |
| oculus sinister (O.S.) | left eye |
| oderint dum metuant | let them hate, so long as they fear | favorite saying of Caligula, attributed originally to Lucius Accius, Roman tragic poet (170 BC) |
| odi et amo | I hate and I love | opening of Catullus 85; the entire poem reads, "odi et amo quare id faciam fortasse requiris / nescio sed fieri sentio et excrucior" (I hate and I love. Why do I do this, you perhaps ask. / I do not know, but I feel it happening to me and I am burning up.) |
| odi profanum vulgus et arceo | I hate the unholy rabble and keep them away | Horace, Carmina III, 1 |
| odium theologicum | theological hatred | name for the special hatred generated in theological disputes |
| oleum camino | (pour) oil on the fire | from Erasmus' (1466–1536) collection of annotated Adagia |
| omne ignotum pro magnifico | every unknown thing [is taken] for great | or "everything unknown appears magnificent" The source is Tacitus: Agricola, Book 1, 30 where the sentence ends with 'est'. The quotation is found in Arthur Conan Doyle's Sherlock Holmes short story "The Red-Headed League" (1891) where the 'est' is missing. |
| omne initium difficile est | every beginning is difficult | |
| omne vivum ex ovo | every living thing is from an egg | foundational concept of modern biology, opposing the theory of spontaneous generation |
| Omnes homines sunt asini vel homines et asini sunt asini | All men are donkeys or men and donkeys are donkeys | a sophisma proposed and solved by Albert of Saxony (philosopher) |
| omnes vulnerant, postuma necat, or, omnes feriunt, ultima necat | all [the hours] wound, last one kills | usual in clocks, reminding the reader of death |
| omnia cum deo | all with God | motto for Mount Lilydale Mercy College, Lilydale, Victoria, Australia |
| omnia dicta fortiora si dicta Latina | everything said [is] stronger if said in Latin | or "everything sounds more impressive when said in Latin"; a more common phrase with the same meaning is quidquid Latine dictum sit altum videtur (whatever said in Latin, seems profound) |
| omnia in mensura et numero et pondere disposuisti | Thou hast ordered all things in measure, and number, and weight. | Book of Wisdom, 11:21 |
| Omnia mea mecum porto | All that is mine I carry with me | is a quote that Cicero ascribes to Bias of Priene |
| omnia mutantur, nihil interit | everything changes, nothing perishes | Ovid (43 BC – 17 AD), Metamorphoses, book XV, line 165 |
| omnia omnibus | all things to all men | 1 Corinthians 9:22 |
| si omnia ficta | if all (the words of poets) is fiction | Ovid, Metamorphoses, book XIII, lines 733–4: "si non omnia vates ficta" |
| omnia vincit amor | love conquers all | Virgil (70 BC – 19 BC), Eclogue X, line 69 |
| omnia munda mundis | everything [is] pure to the pure [men] | from The New Testament |
| omnia praesumuntur legitime facta donec probetur in contrarium | all things are presumed to be lawfully done, until it is shown [to be] in the reverse | in other words, "innocent until proven guilty" |
| omnia sponte fluant absit violentia rebus | everything should flow by itself, force should be absent | "let it go" |
| omnia sunt communia | all things shall be held in common | from Acts of the Apostles |
| omnis vir enim sui | Every man for himself! | |
| omnibus idem | the same to all | motto of Pieter Corneliszoon Hooft, usually accompanied by a sun, which shines for (almost) everyone |
| omnibus locis fit caedes | There is slaughter everywhere (in every place) | Julius Caesar's The Gallic War, 7.67 |
| omnis traductor traditor | every translator is a traitor | every translation is a corruption of the original; the reader should take heed of unavoidable imperfections |
| omnis vir tigris | everyone a tiger | motto of the 102nd Intelligence Wing |
| omnium gatherum | gathering of all | miscellaneous collection or assortment; "gatherum" is English, and the term is used often used facetiously |
| onus probandi | burden of proof | |
| onus procedendi | burden of procedure | burden of a party to adduce evidence that a case is an exception to the rule |
| opera omnia | all works | collected works of an author |
| opera posthuma | posthumous works | works published after the author's death |
| operari sequitur esse | act of doing something follows the act of being | scholastic phrase, used to explain that there is no possible act if there is not being: being is absolutely necessary for any other act |
| opere citato (op. cit.) | in the work that was cited | used in academic works when referring again to the last source mentioned or used |
| opere et veritate | in action and truth | doing what you believe is morally right through everyday actions |
| opere laudato (op. laud.) | | See opere citato |
| operibus anteire | leading the way with deeds | to speak with actions instead of words |
| ophidia in herba | a snake in the grass | any hidden danger or unknown risk |
| opinio juris sive necessitatis | an opinion of law or necessity | a belief that an action was undertaken because it was a legal necessity; source of customary law |
| opus anglicanum | English work | fine embroidery, especially used to describe church vestments |
| Opus Dei | The Work of God | Catholic organisation |
| ora et labora | pray and work | This principle of the Benedictine monasteries reads in full: "Ora et labora (et lege), Deus adest sine mora." "Pray and work (and read), God is there without delay" (or to keep the rhyme: "Work and pray, and God is there without delay") |
| ora pro nobis | pray for us | "Sancta Maria, mater Dei, ora pro nobis pecatoribus"; Brazilian name for Pereskia aculeata |
| orando laborando | by praying, by working | motto of Rugby School |
| oratio recta | direct speech | expressions from Latin grammar |
| oratio obliqua | indirect speech | expressions from Latin grammar |
| oratio pro domo | speech for [one's own] house | also abbreviated pro domo; speak on one's own behalf; based on a speech by Cicero in legal proceedings in 57 AD to regain his house on the Palatine Hill that was confiscated during his exile |
| orbis non sufficit | the world does not suffice or the world is not enough | from Satires of Juvenal (Book IV/10), referring to Alexander the Great; James Bond's adopted family motto in the novel On Her Majesty's Secret Service; it made a brief appearance in the film adaptation of the same name and was later used as the title of the nineteenth James Bond film, The World Is Not Enough. |
| orbis unum | one world | seen in The Legend of Zorro |
| ordo ab chao | out of chaos, comes order | one of the oldest mottos of Craft Freemasonry. |
| (oremus) pro invicem | (Let us pray), one for the other; let us pray for each other | Popular salutation for Roman Catholic clergy at the beginning or ending of a letter or note. Usually abbreviated OPI. ("Oremus" used alone is just "let us pray"). |
| orta recens quam pura nites | newly risen, how brightly you shine | Motto of New South Wales |