許す, 赦す, 聴す, ゆるす
Conjugated: 許せない
Godan verb, Transitive
1. to permit, to allow, to approve, to consent to
2. to forgive, to pardon, to excuse, to tolerate
3. to exempt (someone) from, to remit, to release, to let off
See 自他ともに許す
4. to acknowledge, to admit
See 心を許す, See 気を許す
5. to trust, to confide in, to let one's guard down
あなたが後悔しているのなら許してあげよう。