having a harsh, disagreeably acrid taste, like that of aspirin, quinine, wormwood, or aloes.

producing one of the four basic taste sensations; not sour, sweet, or salt.

hard to bear; grievous; distressful

a bitter sorrow.

causing pain; piercing; stinging

a bitter chill.

characterized by intense antagonism or hostility

bitter hatred.

hard to admit or accept

a bitter lesson.

resentful or cynical

bitter words.

that which is bitter; bitterness

Learn to take the bitter with the sweet.

British . a very dry ale having a strong taste of hops.

to make bitter

herbs employed to bitter vermouth.

extremely; very; exceedingly

a bitter cold night.

noun

sweetness , contentment , geniality , happiness

noun

acerbity , acidity , acridity , astringency , brackishness , brininess , piquancy , pungency , sharpness , tartness , vinegariness , acrimoniousness , anguish , asperity , distress , grievousness , harshness , hostility , mordancy , pain , painfulness , sarcasm , venom , virulence , acrimony , embitterment , gall , rancor , rancorousness , resentfulness , virulency , agony , animosity , antagonism , enmity , implacableness , intensity , malevolence , malice , malignity , poignancy , rue , scorn , severity , sourness , wormwood