1. marked by firm determination or resolution; not shakable (Freq. 1) - firm convictions - a firm mouth - steadfast resolve - a man of unbendable perseverence - unwavering loyalty • Syn: firm, steadfast, steady, stiff, unbendable, unfaltering, unshakable • Similar to: resolute • Derivationally related forms: stiffness (for: stiff), steadiness (for: steady), steadfastness (for: steadfast), firmness (for: firm) 2. not showing abrupt variations - spoke in a level voice - "she gave him a level look"- Louis Auchincloss • Syn: level • Similar to: steady