saddest
sad-dest
adjective
The superlative form of 'sad', meaning most unhappy or sorrowful.
"It was the saddest day of her life."
Thesaurus
Synonyms: pitiful, sorry, distressing, deplorable, lamentable, sad, bad, tragicomic, heavyhearted, wistful, mournful, bittersweet
Antonyms: glad