Mad
Part of speech: adverb
Definition: Intensifier; to a large degree; extremely; exceedingly; very; unbelievably.
Part of speech: verb
Definition: To madden, to anger, to frustrate.
Part of speech: adjective
Definition: Insane; mentally deranged. Angry, annoyed. Wildly confused or excited. Extremely foolish or unwise; irrational; imprudent. (usually as mad for or mad about) Extremely enthusiastic about; crazy about; infatuated with; overcome with desire for. abnormally ferocious or furious; or, rabid, affected with rabies. Intensifier, signifies an abundance or high quality of a thing; much or many.
Example sentence: There is a pleasure in being mad which none but madmen know.
Harebrained
Part of speech: adjective
Definition: absurd, foolish or stupidfrivolous and silly; featherbrained or scatterbrained