ichidan verb, transitive verb
General physical insertion of something into a space, container, or opening.
封筒に書類を差し入れる。
I insert the documents into the envelope.
鍵を鍵穴に差し入れて回
Insert the key into the keyhole and turn it.
ichidan verb, transitive verb
send in (to a prisoner); deliver (to a detainee)
Specifically for sending items such as clothes, books, or money to someone in prison or detention.
家族が刑務所の彼に衣類を差し入れた。
His family sent clothes in to him at the prison.
ichidan verb, transitive verb
deliver (food, supplies); supply (to workers)
Used for providing food, drinks, or other supplies to people working at a site, during an event, or in a similar situation.
現場の作業員にお茶とおにぎりを差し入れた。
We delivered tea and rice balls to the workers at the site.