The syllable structure of Yoruba is (C)V(N). Syllabic nasals are also possible. Every syllable bears one of the three tones: high , mid (generally left unmarked), and low . The sentence (''I didn't go'') provides examples of three syllable types: • — —
I • — —
not (negation) • — —
to go Vowels diagram, adopted from . Black dots mark oral vowels, while the colored regions indicate the ranges in possible quality of the nasal vowels.|class=skin-invert-image Standard Yoruba has seven oral and five nasal vowels. There are no
diphthongs in Yoruba; sequences of vowels are pronounced as separate syllables.
Dialects differ in the number of vowels they have; see
above. • In some cases, the phonetic realization of these vowels is noticeably different from what the symbol suggests: • The oral is close front , and the nasal varies between close front and near-close front . • The oral is close back , and the nasal varies between close near-back , close back , near-close near-back and near-close back . • The oral are close-mid , and do not have nasal counterparts. • The oral is open-mid , and the nasal varies between mid and open-mid . • The oral is near-open , and the nasal varies between open-mid and near-open . • The oral is central . Nasal vowels are by default written as a vowel letter followed by , thus: , , , , . These do not occur word-initially. Phonemically, the standard language only has 3 nasal vowels . is only used in the word ‘thatʼ, an SEY word borrowed into the standard language which is slowly gaining traction over the traditional word, . is how is pronounced after labial consonants, an
allophony represented within the orthography (Compare ‘gun’, spelled with and pronounced with a rounded vs. ‘to shineʼ, spelled with and pronounced with an unrounded ). Some speakers pronounce all instances of as , due to the lack of a meaningful phonemic difference between the two in the standard dialect. All vowels are nasalized after the consonant , and thus there is no additional in writing (, , ). In addition, the consonant has a nasal allophone before a nasal vowel (see
below), and this is reflected in writing: ("inside, belly") ( → ).
Consonants The voiceless plosives and are slightly aspirated; in some Yoruba varieties, and are more dental. The
rhotic consonant is realized as a flap or, in some varieties (notably Lagos Yoruba), as the
alveolar approximant due to English influence. This is particularly common with Yoruba–English bilinguals. Like many other languages of the region, Yoruba has the
voiceless and
voiced labial–velar stops and : 'field', '''' 'all'. Notably, in Nigeria it lacks a
voiceless bilabial stop , apart from
phonaesthesia, such as [pĩpĩ] for vehicle horn sounds, and
marginal segments found in recent loanwords, such as for "pencil". Yoruba also lacks a
phoneme ; the letter is used for the sound in the orthography, but strictly speaking, it refers to an
allophone of immediately preceding a nasal vowel. In addition to this, Yoruba lacks the breathy h that one might find in English words like house or hat. When speaking most people will add a
glottal stop, , an approximant like , or just leave it silent. There is also a
syllabic nasal, which forms a
syllable nucleus by itself. When it precedes a vowel, it is a velar nasal : 'I didn't go'. In other cases, its place of articulation is
homorganic with the following consonant: 'he is going', 'he is jumping'.
Tone Yoruba is a
tonal language with three-level tones and two or three contour tones. Every syllable must have at least one tone; a syllable containing a long vowel can have two tones. Tones are marked by use of the acute accent for high tone (, ) and the grave accent for low tone (, ); mid is unmarked, except on syllabic nasals where it is indicated using a macron (, ). Examples: • H: 'he jumped'; 'spoon' • M: 'he is forward'; 'body' • L: 'he asks for pardon'; 'spear'. When teaching Yoruba literacy,
solfège names of musical notes are used to name the tones: low is
do, mid is
re, and high is
mi.
Whistled Yoruba Apart from tone's lexical and grammatical use, it is also used in other contexts such as whistling and drumming. Whistled Yoruba is used to communicate over long distances. The language is transformed as speakers talk and whistle simultaneously: consonants are devoiced or turned to , and all vowels are changed to . However, all tones are retained without any alteration. The retention of tones enables speakers to understand the meaning of the whistled language. The Yoruba
talking drum, the or , which accompanies singing during festivals and important ceremonies, also uses tone.
Tonality effects and computer-coded documents Written Yoruba includes
diacritical marks not available on conventional computer keyboards, requiring some adaptations. In particular, the use of the sub dots and tone marks are not represented, so many Yoruba documents simply omit them. Asubiaro Toluwase, in his 2014 paper, points out that the use of these diacritics can affect the retrieval of Yoruba documents by popular search engines. Therefore, their omission can have a significant impact on online research.
Assimilation and elision When a word precedes another word beginning with a vowel, assimilation, or deletion ('
elision') of one of the vowels often takes place. Since syllables in Yoruba normally end in a vowel, and most nouns start with one, it is a widespread phenomenon, and it is absent only in slow, unnatural speech. The orthography here follows speech in that word divisions are normally not indicated in words that are contracted due to assimilation or elision: → 'buy fish'. Sometimes, however, authors may choose to use an inverted comma to indicate an elided vowel as in → 'in the house'. Long vowels within words usually signal that a consonant has been elided word-internally. In such cases, the tone of the elided vowel is retained: → 'hearth'; → 'grass'; → 'truth'. == Vocabulary ==