# aquilo
## Latin
### Alternative forms

* Aquilō (letter case)

### Etymology

Perhaps from aquila (“eagle”) +‎ -ō (name-forming suffix), personifying the cold north wind as a "fast, aggressive raptor".

### Noun

aquilō m (genitive aquilōnis); third declension
* north wind, the wind god Boreas
    Synonyms: boreās, septentriō
** 29 BCE – 19 BCE, Virgil, Aeneid 4.309–311:“Quīn etiam hībernō mōlīris sīdere classem, et mediīs properās aquilōnibus īre per altum, crūdēlis?” [...].“What’s worse, you dare rig your fleet under wintry stars, and hasten to sail across the deep sea – amidst the north winds! [Isn’t this an act] of cruelty?” (Dido rebukes Aeneas.)
* the north
* (New Latin) kite

#### Declension

Third-declension noun.
| Case | Singular | Plural |
| Nominative | aquilō | aquilōnēs |
| Genitive | aquilōnis | aquilōnum |
| Dative | aquilōnī | aquilōnibus |
| Accusative | aquilōnem | aquilōnēs |
| Ablative | aquilōne | aquilōnibus |
| Vocative | aquilō | aquilōnēs |

#### Derived terms

* Aquilogena
* aquilōnāris
* aquilōnius
* euroaquilō

#### Descendants

* Catalan: Aquiló
* English: Aquilo, Aquilon
* French: Aquilon
* German: Aquilo
* Italian: Aquilone
* Polish: Akwilon
* Russian: Аквилон (Akvilon)
* Spanish: aquilón

### References

* De Vaan, Michiel (2008) “aquila”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 49

### Further reading

* “aquilo”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
* “aquilo”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
* aquilo in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.

## Portuguese
### Alternative forms

* aquillo (pre-1911/1943)

### Etymology

From Old Galician-Portuguese aquilo, from Vulgar Latin *eccum illum, neuter singular of *eccum ille.

### Pronunciation

* (Brazil) IPA: /aˈki.lu/
* (Brazil) IPA: /aˈki.lu/
** (Southern Brazil) IPA: /aˈki.lo/
* (Portugal) IPA: /ɐˈki.lu/
* Hyphenation: a‧qui‧lo
* Audio (São Paulo):(file)

### Pronoun

aquilo (indefinite demonstrative pronoun)
* that, that thing (demonstrative)
    Ou isto ou aquilo[It's] either this or that (there's no third option)
* (obsolete, literature, literary) that sentence; that word, that dictum

#### Usage notes

* Mainly used to represent things yet to be introduced or explained (in contrast with aquele or aquela). Also used with objects rather than people.

#### See also

Portuguese demonstratives :
| | | Pronouns | Pronouns | Pronouns | Pronouns | Pronouns | Adverbs |
| | | Singular | Singular | Plural | Plural | Neuter | Adverbs |
| | | Masculine | Feminine | Masculine | Feminine | Neuter | Adverbs |
| Proximal | X | este | esta | estes | estas | isto | aqui, cá |
| Proximal | de + X | deste | desta | destes | destas | disto | daqui |
| Proximal | em + X | neste | nesta | nestes | nestas | nisto | — |
| Medial | X | esse | essa | esses | essas | isso | aí |
| Medial | de + X | desse | dessa | desses | dessas | disso | daí |
| Medial | em + X | nesse | nessa | nesses | nessas | nisso | — |
| Distal | X | aquele | aquela | aqueles | aquelas | aquilo | ali, lá, acolá |
| Distal | de + X | daquele | daquela | daqueles | daquelas | daquilo | dali |
| Distal | em + X | naquele | naquela | naqueles | naquelas | naquilo | — |
| Distal | a + X | àquele | àquela | àqueles | àquelas | àquilo | — |
| Anaphoric | X | o | a | os | as | — | — |
| Anaphoric | de + X | do | da | dos | das | — | — |
| Anaphoric | em + X | no | na | nos | nas | — | — |
| Anaphoric | a + X | ao | à | aos | às | — | — |

### References

* “aquilo”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2024
* “aquilo”, in Dicionário infopédia da Língua Portuguesa (in Portuguese), Porto: Porto Editora, 2003–2024