trope
/trəʊp/noun
1- a figurative or metaphorical use of a word or expression转义, 比喻。
1.1
- a significant or recurrent theme; a motif重要（或频频出现）的主题; 主线：
she uses the Eucharist as a pictorial trope.
她把圣餐作为绘画主线。
词源
mid 16th cent.: via Latin from Greek tropos 'turn, way, trope', from trepein 'to turn'.