詳くわしくくわしくMeanings1adverbin detail; fully; at lengthUsed when explaining, describing, or knowing something thoroughly. Often appears with verbs like 説明する, 話す, 知る.その問もん題だいについて詳くわしく説せつ明めいしてください。Please explain the issue in detail.彼かれはその事じ件けんを詳くわしく知しっている。He knows the incident in detail.