Syllabic structure The Arem language makes use of both monosyllabic words and sesquisyllabic words. It is estimated that 55–60% of the Arem language's consists of sesquisyllabic words. This is much higher than the majority of other Vietic languages that typically utilize sesquisyllables in only 35-40% of their lexicon, if the particular language contains any sesquisyllables at all.
Suprasegmentals Arem's vowel inventory is split into two series of voice-type
registers. Series 2 is characterized by a low-breathy register phonation. In syllables ending in voiced finals (/Ø, w j l m n ɲ ŋ/), this register involves a contrast between a low-breathy modal tone and a glottalized tone marked by a weak glottal stop. Syllables ending in /-h/ produce a tone corresponding to the Vietnamese
huyền, while those checked by voiceless stops (/-p -t -c -k/) yield low-pitch outcomes corresponding to the tone
nặng. This registral opposition is the result of vowel splitting in two series from a single proto-vowel. Series 1 is characterized by a high-clear register phonation. Within syllables containing voiced finals, this series maintains a contrast between a high, clear, unmarked tone and a high, glottalized, slightly raising tone. Clear vowels in syllables ending in /-h/ correspond to the Vietnamese tone
hỏi. In checked syllables ending in voiceless stops, vowels of this series yield high-pitch outcomes corresponding to the Vietnamese tone
sắc. The combination of the contrast between clear and breathy phonation with glottalization in unchecked syllables forms the four-tone system, per Ferlus (2014). Ta (2025) disputes Ferlus that Arem laryngeal finals have never been dropped which contra to real tonogenesis found in
Ruc and
Vietnamese. The f0 variations appear too shifting among speakers, indicating that the pitch contrast is phonetic (allophonic) rather than structurally phonemic (lexical), which in sum shows that Arem is a non-tonal, register language.
Vowels Breathy Clear Consonants Initials Codas ==Notes and references==