send-back
phrasal verbUK /ˌsend ˈbæk/
US /ˌsɛnd ˈbæk/
To send something back means to give it back or mail it to the place it came from.
The shirt was too small, so I sent it back to the store.
OTHER MEANINGS
2. To make someone go back to a place where they were before.
The teacher sent the noisy student back to his seat.
3. To reply to someone, especially by mail or message.
Please send back a quick answer by Friday.
4. In sports, to hit or throw the ball back to the other side.
She sent the ball back over the net.