微びに入いり細さいを穿うがつ

expression, godan verb (-tsu)

go into minute details; split hairs

Idiomatic expression meaning to examine or describe something in extremely fine detail, often excessively so. Can carry a nuance of being overly meticulous or pedantic.

• 彼かれの説せつ明めいは微びに入いり細さいを穿うがつものだった。

  His explanation went into the minutest details.

• 微びに入いり細さいを穿うがつような議ぎ論ろんは避さけよう。

  Let's avoid splitting hairs in the discussion.