simple past tense and past participle of bitter

Full of bitterness.

plural of bittering

Causing a bitter taste or smell.

A bitter compound used in adulterating beer.

present participle of bitter

comparative form of bitter: more bitter

The quality of having a bitter taste. / The quality of feeling bitter; acrimony, resentment; the quality of exhibiting such feelings. / The quality of eliciting a bitter, humiliating or harsh feeling.

To make bitter.

(computing, informal, in combination) A hardware system whose architecture is based around units of the specified number of bits (binary digits).