unbendable

Adj.

1.

unbendable - marked by firm determination or resolution; not shakable; "firm convictions"; "a firm mouth"; "steadfast resolve"; "a man of unbendable perseverence"; "unwavering loyalty" Synonyms: firm, steadfast, unfaltering, unshakable, unwavering, steady

firm, resolute, steadfast, steady, unfaltering, unshakable, unwavering