unstressed
adjective uk/ʌnˈstrest/ us/ʌnˈstrest/
(NOT WORRIED)
不担忧的，放松的
not feeling worried; feeling relaxed and not experiencing stress
She said that she was feeling completely unstressed about the wedding. 她说自己对婚礼感觉完全放松。
(PRONUNCIATION)
phonetics, literature specialized（单词或音节）非重读的
(of a word or syllable) not pronounced with stress (= emphasis)
Most words that are made up of more than one syllable have at least one stressed syllable and one unstressed syllable. 绝大部分有两个以上音节的单词都有至少一个重读音节和一个非重读音节。