Not adequate; not sufficient; not equal to what is required
Impossible to tolerate or endure; unbearable:
The definition of lousy is something poorly done, disgusting or gross.
Open to objection
Not adequate in quality or quantity; inferior:
Not likely to please; objectionable:
Not received with pleasure into one's company or home:
Having an ugly or unattractive face.
The definition of insufferable is intolerable, or is someone who is full of himself or extremely arrogant.
Giving satisfaction sufficient to meet a demand or requirement; adequate.
Satisfactory or agreeable; acceptable:
The definition of desirable is something or someone attractive and wanted.
Liable to exception; open to objection
Having almost or exactly the same qualities, characteristics, etc.; similar; equal
Find another word for unacceptable. In this page you can discover 26 synonyms, antonyms, idiomatic expressions, and related words for unacceptable, like: below-par, deficient, inadequate, intolerable, lousy, objectionable, poor, undesirable, unsuitable, unwelcome and unworthy.