1. 无重音的：unbodied 无形体的 | unaccented 无重音的 | un- == 非

2. 不重读的：unable 不能的 | unaccented 不重读的 | unacceptable 不可接受的

3. 无抑扬的：无以匹敌的人nonesuch | 无抑扬的unaccented | 无意inadvertantaccidental

4. 无重音的/无抑扬的/没有重音的：unaccelerated /未加速的/ | unaccented /无重音的/无抑扬的/没有重音的/ | unacceptable /无法接受的/不受欢迎的/

adj

1. (used of vowels or syllables) pronounced with little or no stress

e.g. a syllable that ends in a short vowel is a light syllable
a weak stress on the second syllable

Synonym: lightweak

2. used of syllables

e.g. an atonic syllable carries no stress

Synonym: atonic