adjective
1.
Synonyms: unnecessary , inessential, needless, unessential, unneeded, unneedful, unrequired
Antonyms: required
2.
Synonyms: supererogatory , gratuitous, supererogant, supererogative, unasked, wanton
3.
Synonyms: baseless , bottomless, foundationless, gratuitous, groundless, unfounded, ungrounded, unwarranted
Related Word: absurd, foolish, preposterous, silly; impertinent, intrusive, officious
Antonyms: well-founded
4.
Synonyms: rude 6, discourteous, disgracious, disrespectful, ill-mannered, impertinent, impolite, incivil, uncivil, ungracious