Noun:

1. a subdued emotional quality underlying an utterance; implicit meaning

2. a current below the surface of a fluid

connotationn.涵义；言外之意；[逻]内涵

currentn.趋势；(水、气、电)流adj.现在的；流通的

tiden.趋势；潮流；潮汐；潮水v.渡过；（使）随潮漂流

undertown.底流；退浪；下层逆流

pullv.拉；拖；牵；拔；吸引n.拉；拉力；引力；划船；影响力

streamn.(小)河；水流；(人；车；气)流；组v.流动；流出；飘动；将(学生)按能力分组

flown.流动；涨潮；流；流量vi.流动；涌出；飘动；流畅vt.淹没

feelingn.感觉；知觉；气氛；鉴赏力；反感adj.有感情的；富于同情心的；含情脉脉的（复）feelings：感情.

hintn.暗示v.暗示；示意

suggestionn.建议；意见；有...迹象；联想

tracen.痕迹；微量；踪迹v.追踪；描绘；找出根源

tingen.淡色；些微气味(常与with连用)；一丝痕迹v.微染

nuancen.细微差别

undertonen.低音；浅色；底色；潜在的含义

undertiden.暗流；潜流

1. There was an undercurrent of antipathy between them.
   他们两人之间潜伏着一股反感的暗流。
2. The undercurrent of despair or madness or illogicalness would lead to the impossible fantasies of future.
   无意识当中的绝望、狂热、无逻辑性会导致未来难以想象的疯狂。