- designating or having a sharp, often unpleasant taste; acrid, as quinine or peach stones
- causing or showing sorrow, discomfort, or pain; grievous
- sharp and disagreeable; harsh; severe; piercing: a bitter wind
- characterized by strong feelings of hatred, resentment, cynicism, etc.
ME < OE biter, akin to bītan, bite
transitive verb, intransitive verb
to make or become bitter