仔し細さいに

adverb

in detail; minutely; closely

Used when examining, explaining, or investigating something thoroughly, paying attention to fine points. Often appears in formal or written contexts.

• 事じ件けんの経けい緯いを仔し細さいに調しらべる必ひつ要ようがある。

  We need to investigate the circumstances of the incident in detail.

• 彼かれは契けい約やく書しょを仔し細さいに検けん討とうした。

  He examined the contract minutely.