是動詞，表示暗示；間接提及；示意
英文解釋就是to mention sth, especially in an indirect way（提及某件事情，尤指用不直接的方式提及）
例句：In his letter he indicated to us (that) he was willing to cooperate.他在信中向我們透露他願意合作。
insinuate
也是動詞，可以表示暗示，但是它更多的是旁敲側擊地指出(不快的事)
英文解釋是to suggest indirectly that sth unpleasant is true（不直接地旁敲側擊或說含沙射影或說拐彎抹角透露著真實但是讓人不高興的事）
例句The article insinuated that he was having an affair with his friend's wife.文章含沙射影地點出他和朋友的妻子有染。
What are you trying to insinuate?
妳拐彎抹角想說什麽？
所以insinuate是壹個比較負面的表示暗示的詞，而indicate就是相對比較中性的表示暗示的詞。