One can't help admiring Lucy's tact, when during their ramble with the Emersons, Miss Lavish and the clergymen, she leaves Charlotte and Miss Lavish on their own, so that they could gossip.

tact 是名词，来自拉丁语 tactus（触摸），引申为"得体、机智、圆滑"，指在社交场合中能够得体地处理人际关系的能力。