1. firm, steadfast, steady, stiff, unbendable, unfaltering, unshakable, unwavering -- (marked by firm determination or resolution; not shakable; "firm convictions"; "a firm mouth"; "steadfast resolve"; "a man of unbendable perseverence"; "unwavering loyalty")
1.
Hark the infernal orgies that revelry is forward mark the unfaltering silence aft Methinks it pictures life. - from Moby Dick; or The Whale by Herman Melville