The phonological system described here is the inventory of sounds of the standard spoken language, represented using the
International Phonetic Alphabet (IPA).
Consonants The voiceless plosives may occur with or without
aspiration (as vs. , etc.); this difference is contrastive before a vowel. However, the aspirated sounds in that position may be analyzed as sequences of two
phonemes: . This analysis is supported by the fact that
infixes can be inserted between the stop and the aspiration; for example ('big') becomes ('size') with a nominalizing infix. When one of these plosives occurs initially before another consonant, aspiration is no longer contrastive and can be regarded as mere phonetic detail: slight aspiration is expected when the following consonant is not one of (or if the initial plosive is ). The voiced plosives are pronounced as
implosives by most speakers, but this feature is weak in educated speech, where they become . In syllable-final position, and approach and respectively. The stops are unaspirated and have
no audible release when occurring as syllable finals. The description below follows Huffman (1970). In addition, some diphthongs and triphthongs are analyzed as a vowel nucleus plus a
semivowel ( or ) coda because they cannot be followed by a final consonant. These include: (with short monophthongs) , , , , ; (with long monophthongs) , ; (with long diphthongs) , , , , and . The independent vowels are a feature of the Khmer script: they are the vowel graphemes that can exist without a preceding or trailing written consonant. The independent vowels may be used as monosyllabic words, or as the initial syllables in longer words. Khmer words as written never begin with regular vowels; they can, however, begin with independent vowels. Example: ឰដ៏, ឧទាហរណ៍, ឧត្តម, ឱកាស...។
Syllable structure A Khmer
syllable begins with a single consonant, or else with a
cluster of two, or rarely three, consonants. The only possible clusters of three consonants at the start of a syllable are , and (with aspirated consonants analyzed as two-consonant sequences) . There are 85 possible two-consonant clusters (including [pʰ] etc. analyzed as etc.). All the clusters are shown in the following table, phonetically, i.e. superscript can mark either contrastive or non-contrastive aspiration (see
above). Slight vowel
epenthesis occurs in the clusters consisting of a plosive followed by , in those beginning , and in the cluster . A
minor syllable (unstressed syllable preceding the main syllable of a word) has a structure of CV-, CrV-, CVN- or CrVN- (where C is a consonant, V a vowel, and N a nasal consonant). The vowels in such syllables are usually short; in conversation they may be
reduced to , although in careful or formal speech, including on television and radio, they are clearly articulated. An example of such a word is
mɔnuh, mɔnɨh, mĕəʾnuh ('person'), pronounced , or more casually .
Stress Stress in Khmer falls on the final syllable of a word. Because of this predictable pattern, stress is non-
phonemic in Khmer (it does not distinguish different meanings). Primary stress falls on the final syllable, with
secondary stress on every second syllable from the end. Thus in a three-syllable word, the first syllable has secondary stress; in a four-syllable word, the second syllable has secondary stress; in a five-syllable word, the first and third syllables have secondary stress, and so on. Compounds, however, preserve the stress patterns of the constituent words. Thus , the name of a kind of cookie (literally 'bird's nest'), is pronounced , with secondary stress on the second rather than the first syllable, because it is composed of the words ('nest') and ('bird'). The intonation pattern of a typical Khmer declarative phrase is a steady rise throughout followed by an abrupt drop on the last syllable. : ('I don't want it') Other intonation contours signify a different type of phrase such as the "full doubt" interrogative, similar to
yes–no questions in English. Full doubt interrogatives remain fairly even in tone throughout, but rise sharply towards the end. : ('do you want to go to Siem Reap?') Exclamatory phrases follow the typical steadily rising pattern, but rise sharply on the last syllable instead of falling. : ('this book is expensive!') ==Grammar==