verb (used with object), re·sent, re·send·ing.

to send again.
to send back.

Origin of resend

First recorded in 1545–55; re- + send1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Word Origin and History for resend

1550s, from re- + send. Related: Resent; resending.

Online Etymology Dictionary, © 2010 Douglas Harper