WordNet: firm, steadfast, steady, stiff, unbendable, unfaltering, unshakable, unwavering

Sanatista
marked by firm determination or resolution; not shakable; "firm convictions"; "a firm mouth"; "steadfast resolve"; "a man of unbendable perseverence"; "unwavering loyalty"



firm


steadfast


steady


stiff


unbendable


unfaltering


unshakable


unwavering