sorrier
sor-ri-er
adjective
Feeling or expressing a greater degree of regret, pity, or apology.
"He felt sorrier after seeing her tears."
Thesaurus
Synonyms: bad, sorry, regretful, pitiful, distressing, deplorable, lamentable, sad, blue, disconsolate, dreary, grim
Antonyms: unregretful, unregretting