Regret and Sadness

to wail

to cry out loudly and mournfully, often expressing grief, pain, or intense sorrow- howl, roar, ululate, yaup, yawl

to bewail

to express deep sorrow or grief, often accompanied by loud cries or mournful sounds- bemoan, deplore, lament

to atone

(religious) to make up for a sin by feeling sorry, asking for forgiveness, and trying to do better- repent

to rue

to feel regret or sorrow for something- regret, repent

to lament

to verbally express deep sadness over a loss or unfortunate situation- keen

to bemoan

to express great regret or sorrow for something- bewail, deplore, lament

to recant

to withdraw or take back a statement, belief, or opinion, especially publicly- abjure, forswear, resile, retract

to despair

to fail to keep hope>< hope

to deplore

to feel deep and sincere regret or sadness about a situation, event, or outcome- bemoan, bewail, lament

to sob

to cry loudly while making repeated, short gasping sounds, often due to intense emotions such as sadness or grief

to despond

to feel extremely discouraged, disheartened, or in low spirits

contrite

expressing or experiencing deep regret or guilt because of a wrong act that one has committed- remorseful, rueful, ruthful