throw in
verb.
add as an extra or as a gratuity
verb.
give up in the face of defeat of lacking hope; admit defeat
In the second round, the challenger gave up
Synonym: quit, give up, fall by the wayside, drop out, drop by the wayside, chuck up the sponge, throw in the towel
verb.
to insert between other elements
She interjected clever remarks
Synonym: come in, inject, interject, interpose, put in