Regret
WordNet
noun
(1) Sadness associated with some wrong done or some disappointment
"He drank to drown his sorrows"
"He wrote a note expressing his regret"
"To his rue, the error cost him the game"
verb
(2) Be sorry
"I regret to say that you did not gain admission to Harvard"
(3) Decline formally or politely
"I regret I can't come to the party"
(4) Feel remorse for; feel sorry for; be contrite about
(5) Feel sad about the loss or absence of
WiktionaryText
Etymology
regretten from , from re- (intensive prefix) + greter "to weep", of origin, from *grêtan, grêotan from . Akin to grāzan "to cry", grǣtan "to weep, greet", grēotan "to weep, lament", grāta "to weep, groan", grētan "to weep". More at greet