The term "give back" expresses the idea of returning something that was previously received or taken. To convey this meaning, one might use alternative phrases such as "return," "restore," "repay," or "reimburse." These terms all imply a sense of obligation or responsibility to return what was given or taken. Other options include "hand in," "give up," "yield," or "surrender," which suggest a voluntary act of relinquishing or letting go of something. When expressing the idea of giving back in a philanthropic sense, synonyms might include "donate," "contribute," "give to charity," or "bequeath".