na-adjective
detailed; minute; in great detail
Describes explaining, describing, or knowing something with thorough, careful detail. Often used in formal or literary contexts.
See also: 事細か
彼はその事件について事細やかに説明した。
He explained the incident in great detail.
事細やかな指示を出してくれた。
They gave me very detailed instructions.
事細か is a less common variant with a similar meaning, but 事細やか is more frequently used for a nuanced, careful detailing.
詳細 is a more common and neutral word for 'detailed'; 事細やか carries a slightly more literary or meticulous nuance.
Compound of 事 (こと, 'matter') and 細やか (こまやか, 'detailed, delicate'). The exact historical derivation is uncertain, but the combination conveys thoroughness in dealing with matters.