not showing abrupt variations; "spoke in a level voice"; "she gave him a level look"- Louis Auchincloss突然の変化を示さないさま揺るぎない
marked by firm determination or resolution; not shakable; "firm convictions"; "a firm mouth"; "steadfast resolve"; "a man of unbendable perseverence"; "unwavering loyalty"固い決心または決意を特徴とするさま確固たる