View source for Acadēmīa:Latin pronunciation

The tables below show the International Phonetic Alphabet (IPA) equivalents for Latin sounds.

==Vowels==
Classical Latin had both long and short vowels. For all vowels besides {{IPAchar|/a aː/}}<!-- generated by T:x2ipachar -->, the short and long versions also had markedly different quality, in most phonological environments. The short vowels were considerably more open. This resulted later in the merging of short ''i'' and ''u'' with long ''e'' and ''o'' in Italian, when phonemic vowel length was lost.

{| class="wikitable"
|+ Classical Latin monophthongs
! rowspan="2" | Letter !! rowspan="2" | Environment || colspan="3" | IPA
|-
! Phonemic notation !! 100AD Phonetic notation !! 100BC Phonetic notation
|-
| a || in all cases || {{IPAchar|/a/}} || {{IPAchar|[a]}} || {{IPAchar|[a]}}
|-
| ā || in all cases || {{IPAchar|/aː/}} || {{IPAchar|[aː]}} || {{IPAchar|[aː]}}
|-
| rowspan="3" | e || in most cases || rowspan="3" | {{IPAchar|/e/}} || {{IPAchar|[ɛ]}} || {{IPAchar|[e]}}
|-
| before a vowel || {{IPAchar|[e]}} or {{IPAchar|[i]}}? || {{IPAchar|[e]}}
|-
| before ''r'' || {{IPAchar|[æ]}}? || {{IPAchar|[ɛ]}}?
|-
| ē || in all cases || {{IPAchar|/eː/}} || {{IPAchar|[eː]}} || {{IPAchar|[eː]}}
|-
| rowspan="2" | i || in most cases || rowspan="2" | {{IPAchar|/i/}} || {{IPAchar|[ɪ]}} || {{IPAchar|[i]}}
|-
| before a vowel || {{IPAchar|[i]}} || {{IPAchar|[i]}}
|-
| ī || in all cases || {{IPAchar|/iː/}} || {{IPAchar|[iː]}} || {{IPAchar|[iː]}}
|-
| o || in all cases || {{IPAchar|/o/}} || {{IPAchar|[ɔ]}} || {{IPAchar|[o]}}
|-
| ō || in all cases || {{IPAchar|/oː/}} || {{IPAchar|[oː]}} || {{IPAchar|[oː]}}
|-
| u || in all cases || {{IPAchar|/u/}} || {{IPAchar|[ʊ]}} || {{IPAchar|[u]}}
|-
| ū || in all cases || {{IPAchar|/uː/}} || {{IPAchar|[uː]}} || {{IPAchar|[uː]}}
|-
| y || in all cases || {{IPAchar|/y/}} || {{IPAchar|[y]}} or {{IPAchar|[ʏ]}}? || non-existent
|-
| ȳ || in all cases || {{IPAchar|/yː/}} || {{IPAchar|[yː]}} || non-existent
|}
{| class="wikitable"
|+ Classical Latin diphthongs
! Letters !! IPA
|-
| ae || {{IPAchar|/ae̯/}}
|-
| au || {{IPAchar|/au̯/}}
|-
| ei || {{IPAchar|/ei̯/}}
|-
| eu || {{IPAchar|/eu̯/}}
|-
| oe || {{IPAchar|/oe̯/}}
|-
| ui || {{IPAchar|/ui̯/}}
|}
''Note the [[w:Inverted breve|inverted breve]], which indicates that the vowel does not form a separate syllable.''

===I and J===
In Latin, the letter written as '''I''' in ancient times was either a [[vowel]] or a [[consonant]], or rarely a sequence of consonant and vowel, depending on position and the word, the vowel being most common. The two forms had different [[pronunciation]] and different [[metre|metrical]] treatment in [[poetry]].

An early modern typographical convention (originating in medieval scripts) is to write [[J]] for the consonant form and leave I for the vowel. This is applied both to ordinary words and proper nouns. A similar modern convention exists in writing the vowel [[V]] as [[U]] (see [[#U and V|U and V]] for more). But while U is very commonly written, the use of J is more variable.

Generally speaking, modern Latin-English dictionaries always use I; however, in the 19th and early 20th centuries the use of J was more widespread (for example, the substantial 1879 dictionary of {{w|Lewis and Short}}). Reprints of classical works on the other hand sometimes write J and sometimes write I. Ecclesiastical works use J more commonly than scholarly classical works, but not to the exclusion of I.

The exclusive use of I never results in ambiguity about the identity of a word, as there are no words that are distinguished solely by the use of I versus J (unlike U versus V; see below).

====Pronunciation====
As a vowel,
* (''Classical''): IPA: short {{IPAchar|/i/}}, long {{IPAchar|/iː/}}
As a consonant,
* (''Classical''): {{IPAchar|/j/}}, but doubled {{IPAchar|/jj/}} when between vowels
As a consonant&ndash;vowel sequence
* (''Classical''): {{IPAchar|/jji/}} after a vowel (e.g. {{m|la|reicit}}), {{IPAchar|/ji/}} after a consonant (e.g. {{m|la|subicio}})

===U and V===
In Latin, the letter written as '''V''' in ancient times represented either a [[vowel]] or a [[consonant]] depending on its position and the word.  These two forms had distinct [[pronunciation]]s and different [[metre|metrical]] treatment in [[poetry]].

A modern [[typography|typographical]] convention is to write [[U]] for the vowel and leave V as the consonant.  Generally speaking [[dictionary|dictionaries]] write U this way and the majority of reprints of classical texts adapt them and show U too.  The use of V for the vowel in new works is usually a deliberately [[classical]] style or appearance, and that includes for example in [[inscription]]s on new [[monument]]s and the like.

Note that there are words where V and U contrast: {{m|la|servit}} is the third-person singular present of {{m|la|serviō}}, pronounced {{IPAchar|/ˈser.wit/}} in two syllables; while {{m|la|seruit}} is the third-person singular perfect of {{m|la|serō}}, pronounced {{IPAchar|/ˈse.ru.it/}} in three syllables.

====Pronunciation====
As consonant,
* (''Classical''): IPA: {{IPAchar|/w/}}, (in Greek loanwords between vowels) {{IPAchar|/ww/}}
As vowel,
* (''Classical''): IPA: short {{IPAchar|/u/}}, long {{IPAchar|/uː/}}

==Consonants==
*'''Consonants''': b (ps, pt) k d f g (ŋ) h j k l m n p kw r s t w ks z kʰ pʰ tʰ

====Allophones of /r/====

Latin has one [[w:rhotic consonant|rhotic consonant]], which is transcribed as /r/ in the [[w:phoneme|phonemic]] transcription used on Wiktionary. The phoneme /r/ likely had multiple phonetic realizations ([[w:allophone|allophones]]) in Classical Latin.

An alveolar trill [r] was likely the predominant realization in at least the following two contexts: after a pause (at the start of an utterance), or when the consonant was geminated (doubled) as /r.r/ [rː], such as in the word {{m|la|terra}}. Most sources describe the trill [r] as the primary pronunciation of Classical Latin /r/.

A [[w:alveolar tap|alveolar tap]] (or flap) [ɾ] was likely a possible allophone of singleton (non-geminate) /r/ in some cases, especially in word-medial intervocalic position. A minority of sources describe the tap [ɾ] as the primary pronunciation of Classical Latin /r/.

There is disagreement about the overall frequency of tap versus trill realizations of /r/. Various contextual factors may have influenced which allophone was used, such as the identity of the surrounding sounds, the position of word and morpheme boundaries, prosody, speech rate, or speech style. Aside from trills and taps, other sounds such as fricatives may have been possible as allophonic pronunciations of the phoneme /r/.

Because of the uncertain distribution of the trill and tap realizations of /r/, and because the IPA recognizes [r] as a valid broad transcription of the tap [ɾ], the phonetic transcriptions in Wiktionary entries do not differentiate between the possible allophones of Latin /r/, and use only the transcription [r].

==Ecclesiastical Latin pronunciation==
In most Latin lemma entries, Wiktionary provides an Ecclesiastical Latin pronunciation reflecting the “Italianate” standard adopted in most of the Roman Catholic Church in the 19th century.