# diagonal
## English
### Etymology

From Middle French diagonal, from Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”), from διά (diá, “across”) + γωνία (gōnía, “angle”).

### Pronunciation

* (Received Pronunciation, General American) IPA: /daɪˈæɡənəl/, /daɪˈæɡnəl/
** Audio (Southern England):(file)
* (General Australian) IPA: /dɑɪˈæɡ.ə.nəl/
* (South Asia) IPA: /ˈɖajaɡ(o)nal/

### Adjective

diagonal (not comparable)
* (geometry) Joining two nonadjacent vertices (of a polygon or polyhedron).
* Having slanted or oblique lines or markings.
* Having a slanted or oblique direction.
** 2011 January 12, Saj Chowdhury, “Liverpool 2 - 1 Liverpool”, in BBC‎:The visitors' undoing was caused by a diagonal ball from the right which was nodded into the six-yard area by Ian Evatt and finished off by Campbell.
* Of or related to the cater-corner (diagonally opposite) legs of a quadruped, whether the front left and back right or front right and back left.

#### Synonyms

* (having a slanted or oblique direction): aslant, aslope, slanted, slanting, sloped, sloping

#### Derived terms

* bidiagonal
* brachydiagonal
* clinodiagonal
* diagonalisation
* diagonality
* diagonalize
* diagonalness
* diagonalwise
* diagrid
* dikes
* dykes
* equidiagonal
* gyrodiagonal
* heptadiagonal
* macrodiagonal
* nondiagonal
* offdiagonal
* orthodiagonal
* pandiagonal
* pentadiagonal
* quasidiagonal
* subdiagonal
* superdiagonal
* tridiagonal

#### Translations
### Noun

diagonal (plural diagonals)
* (geometry) A line joining non-adjacent vertices of a polygon.
* Anything forming or resembling such a line, particularly:
** (geometry) A line or plane at an oblique angle to another.
** (fashion) A line or cut across a fabric at an oblique angle to its sides.
** (typography, uncommon) Synonym of slash ⟨/⟩.
*** 1965, Dmitri A. Borgmann, Language on Vacation, page 240:Initial inquiries among professional typists uncover names like slant, slant line, slash, and slash mark. Examination of typing instruction manuals discloses additional names such as diagonal and diagonal mark, and other sources provide the designation oblique.

#### Synonyms

* (oblique line or cut across a fabric): bias
* (oblique punctuation mark): See slash

#### Antonyms

* (antonym(s) of “oblique punctuation mark”): See backslash

#### Derived terms

* antidiagonal
* broken diagonal
* counterdiagonal
* diagonal argument
* diagonal calendar
* diagonal element
* diagonalization
* diagonalize
* diagonally
* diagonal mark
* diagonal matrix
* diagonal morphism
* diagonal scale
* diagonal spread
* leading diagonal
* main diagonal
* minor diagonal
* secondary diagonal

#### Translations
### Anagrams

* ganoidal, gonadial

## Catalan
### Etymology

Borrowed from Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”).

### Pronunciation

* IPA: (Central) [di.ə.ɣuˈnal]
* IPA: (Balearic) [di.ə.ɣoˈnal]
* IPA: (Valencia) [di.a.ɣoˈnal]

### Adjective

diagonal m or f (masculine and feminine plural diagonals)
* diagonal

#### Derived terms

* diagonalment

### Noun

diagonal f (plural diagonals)
* diagonal

## Crimean Tatar
### Etymology

Borrowed from Russian диагональ (diagonalʹ).

### Noun

diagonal
* diagonal

#### Declension
### References

* “diagonal”, in Luğatçıq (in Russian)

## Danish
### Pronunciation

* IPA: /diaɡonaːl/, [d̥iaɡ̊oˈnæːˀl]

### Adjective

diagonal
* diagonal

#### Inflection

$^1$ When an adjective is applied predicatively to something definite, the corresponding "indefinite" form is used. $^2$ The "indefinite" superlatives may not be used attributively.

### Noun

diagonal c (singular definite diagonalen, plural indefinite diagonaler)
* diagonal

#### Declension
### References

* “diagonal” in Den Danske Ordbog

## French
### Etymology

Borrowed from Latin diagōnālis.

### Pronunciation

* Audio:(file)

### Adjective

diagonal (feminine diagonale, masculine plural diagonaux, feminine plural diagonales)
* diagonal, transverse, oblique

#### Derived terms

* diagonalement

#### Descendants

* → Polish: diagonal

### Further reading

* “diagonal”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

## Galician
### Etymology

From Latin diagōnālis.

### Adjective

diagonal m or f (plural diagonais)
* diagonal

#### Derived terms

* diagonalmente

### Further reading

* “diagonal”, in Dicionario da Real Academia Galega (in Galician), A Coruña: Royal Galician Academy, 2012–2025

## German
### Etymology

From Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”).

### Pronunciation

* Audio:(file)
* Rhymes: -aːl

### Adjective

diagonal (strong nominative masculine singular diagonaler, not comparable)
* diagonal

#### Declension
### Further reading

* “diagonal” in Digitales Wörterbuch der deutschen Sprache
* “diagonal” in Uni Leipzig: Wortschatz-Lexikon

## Polish
### Pronunciation

* IPA: /djaˈɡɔ.nal/
* Rhymes: -ɔnal
* Syllabification: dia‧go‧nal

### Etymology 1

Borrowed from French diagonal.

#### Noun

diagonal m inan
* (textiles) cavalry twill
* (mining) diagonal mine walkway
* (geometry) diagonal line or axis
    Synonym: diagonala

##### Alternative forms

* djagonal (pre-reform orthography (1936))

### Etymology 2

See the etymology of the corresponding lemma form.

#### Noun

diagonal f
* genitive plural of diagonala

### References

* ↑ Mirosław Bańko, Lidia Wiśniakowska (2021) “diagonal”, in Wielki słownik wyrazów obcych, →ISBN

### Further reading

* diagonal in Polish dictionaries at PWN
* Aleksander Zdanowicz (1861) “djagonal”, in Słownik języka polskiego, Wilno 1861
* diagonal in Narodowy Fotokorpus Języka Polskiego

## Portuguese
### Etymology

Borrowed from Latin diagōnālis.

### Pronunciation

* (Brazil) IPA: /d͡ʒi.a.ɡoˈnaw/ [d͡ʒɪ.a.ɡoˈnaʊ̯], (faster pronunciation) /d͡ʒja.ɡoˈnaw/ [d͡ʒja.ɡoˈnaʊ̯]
* (Portugal) IPA: /di.ɐ.ɡuˈnal/ [di.ɐ.ɣuˈnaɫ], (faster pronunciation) /djɐ.ɡuˈnal/ [djɐ.ɣuˈnaɫ]
* (Portugal) IPA: /di.ɐ.ɡuˈnal/ [di.ɐ.ɣuˈnaɫ], (faster pronunciation) /djɐ.ɡuˈnal/ [djɐ.ɣuˈnaɫ]
** (Southern Portugal) IPA: /di.ɐ.ɡuˈna.li/ [di.ɐ.ɣuˈna.li], (faster pronunciation) /djɐ.ɡuˈna.li/ [djɐ.ɣuˈna.li]

### Adjective

diagonal m or f (plural diagonais)
* (geometry) diagonal (joining two nonadjacent vertices)
* diagonal (having a slanted or oblique direction)

#### Derived terms

* diagonalmente

### Noun

diagonal f (plural diagonais)
* diagonal (something arranged diagonally or obliquely)
* (geometry) diagonal (diagonal line or plane)

### Further reading

* “diagonal”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2025

## Romanian
### Etymology

Borrowed from French diagonal.

### Adjective

diagonal m or n (feminine singular diagonală, masculine plural diagonali, feminine and neuter plural diagonale)
* diagonal

#### Declension
## Spanish
### Etymology

From Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”).

### Pronunciation

* IPA: /djaɡoˈnal/ [d̪ja.ɣ̞oˈnal]
* Rhymes: -al
* Syllabification: dia‧go‧nal

### Adjective

diagonal m or f (masculine and feminine plural diagonales)
* diagonal

#### Derived terms

* diagonalmente
* leer en diagonal
* matriz diagonal

### Noun

diagonal f (plural diagonales)
* diagonal

#### Derived terms

* diagonal principal

### Further reading

* “diagonal”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8, Royal Spanish Academy [Spanish: Real Academia Española], 2024 December 10

## Swedish
### Etymology

From Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”).

### Adjective

diagonal (not comparable)
* diagonal

#### Declension

$^1$ The indefinite superlative forms are only used in the predicative. $^2$ Dated or archaic. $^3$ Only used, optionally, to refer to things whose natural gender is masculine.

#### Derived terms

* diagonalt

### Noun

diagonal c
* diagonal

#### Derived terms

* diagonala