Insufferable

Part of speech: adjective (a.)

1. Incapable of being suffered, borne, or endured; insupportable; unendurable; intolerable; as, insufferable heat, cold, or pain; insufferable wrongs. Locke.

2. Offensive beyond endurance; detestable. A multitude of scribblers who daily pester the world with their insufferable stuff. Dryden.