[替古人耽忧 / 替古人耽憂, tì gǔ rén dān yōuㄊㄧˋ ㄍㄨˇ ㄖㄣˊ ㄉㄢ ㄧㄡ] to fret over the worries of long-departed people (成语 saw); to worry unnecessarily; crying over spilt milk; often used with negatives, e.g. no need to worry about past issues
[ふける, fukeru] (v5r, vi) (1) to indulge in; to give oneself up to; to be obsessed by; (aux-v) (2) (See 読み耽ける) to be engrossed in; to be lost in; to be absorbed in; (P)