Synonyms of the word

insufferable

• adj. Not sufferable; very difficult or impossible to endure.

impossible

• adj. Not possible; not able to be done or happen.
• adj. (colloquial, of a person) Very difficult to deal with.
• adj. (mathematics, dated) imaginary.
• n. (obsolete) an impossibility.

intolerable

• adj. Not tolerable; not capable of being borne or endured; not proper or right to be allowed; insufferable;…
• adj. Extremely offensive or insulting.

unacceptable

• adj. unsatisfactory; not acceptable.
• adj. (linguistics) not conforming to accepted usage.
• n. Something that is not acceptable.

unbearable

• adj. so unpleasant or painful as to be unendurable.

unendurable

• adj. Not to be endured; intolerable.

unsufferable

• adj. Not able to be suffered, difficult or impossible to endure; insufferable.