自じ家か薬やく籠ろう

noun

something always at hand; someone at one's beck and call; complete mastery over something

A yojijukugo (four-character idiom) meaning something or someone one can freely use or control at any time, like having one's own medicine cabinet. Often used in the phrase 自家薬籠中の物 (じかやくろうちゅうのもの).

• 彼かれはあらゆる分ぶん野やの知ち識しきを自じ家か薬やく籠ろう中ちゅうの物ものとしている。

  He has complete mastery over knowledge in every field.

• 彼かの女じょは優ゆう秀しゅうな部ぶ下かを自じ家か薬やく籠ろう中ちゅうの物ものにしている。

  She has excellent subordinates at her beck and call.