Acting on or affecting the heart; having a stimulating or invigorating effect on cardiac function.
From Greek 'kardia' (heart) + Latin '-ant' or '-ent' (causing or performing an action). This suffix appears in 'stimulant,' 'relaxant,' and 'coagulant,' describing substances or forces that DO something to the body.
The '-ant' suffix is the language of action—it turns qualities into active forces, making 'stimulant' drugs that stimulate and 'cardiant' substances that affect the heart, as if the suffix itself makes things dynamic.
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