買かい足たす

godan verb (-su), transitive verb

buy more; purchase additional

Used when you already have some of an item and need to buy extra to supplement the existing amount.

• 牛ぎゅう乳にゅうが足たりないので、もう一いっ本ぽん買かい足たした。

  We were short on milk, so I bought one more carton.

• パーティーのために飲のみ物ものを買かい足