smoulder
verb [ I ] UK (US smolder) uk/ˈsməʊl.dər/ us/ˈsmoʊl.dɚ/
(BURN)
无火焰地慢慢烧，闷燃
to burn slowly with smoke but without flames
a smouldering fire 闷燃的火
smouldering embers 闷燃的余烬
The fire was started by a smouldering cigarette. 大火是由闷燃的烟蒂引起的。
(PROBLEM)
（问题或不良局势）持续存在，维持
If a problem or unpleasant situation smoulders, it continues to exist and may become worse at any time.
The dispute is still smouldering, five years after the negotiations began. 谈判开始到现在都5年了，争端的暗火仍在燃烧。
(EMOTION)
（强烈的情绪）郁积，闷在心头
If a strong emotion smoulders, it exists, but is prevented from being expressed.
She was smouldering with rage as she explained how her son had been killed. 她强压着满腔的怒火，叙述了儿子被害的经过。
(ROMANTIC FEELINGS)
欲火中烧;心驰神往
A person who smoulders has strong sexual or romantic feelings but does not express them.
He gazed at her with smouldering eyes, wishing she wasn't married. 他那双充满欲望的眼睛直勾勾地盯着她，心里希望她还没有结婚。