1. Not to be borne or endured.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• unbeakable,
• unbearbly,
• unberably,
• unbearlable,
• unbearalbe,
• unbarible,
• unbeatble,
• umbearable,
• unbarably,
• unbearablely,
• unbareable,
• unbereable,
• unbeliable,
• unbearale,
• unbearble,
• unbareble,
• unberable,
• unremarable,
• ubearable,
• unbeivable

• unbearably,
• unprovable,
• unpardonable,
• unpermed,
• unparalleled,
• unvaried,
• unpersuadable,
• unverbalized,
• unbreakable,
• unfertile,
• unbarrelled,
• unverbalised,
• unversed,
• unperplexed,
• unverifiable,
• unbarreled,
• unparallel,
• unportable,
• unpardonably,
• unprocurable,
• unbarred.

The adjective form of the word "unbearable" is "unbearable".

The plural form of the word "unbearable" is "unbearables".

The singular form of the word "unbearable" is "unbearable". The word does not change in form whether it is used in singular or plural form.