The word "un-bendable" means something that cannot be bent or flexed. Some synonyms for the word are inflexible, stiff, rigid, unbending, immovable, unyielding, and adamant. These words can be used interchangeably, depending on the context of the sentence and the tone of the message that the writer wants to convey. For instance, inflexible can refer to a law, while unbending can be used in describing a person's personality. Regardless of the synonym that is used, the meaning remains the same - something that won't budge or bend easily and that can withstand pressure or external forces.