Hot, boiling, or seething; characterized by agitation and turbulent motion (archaic).
From Latin 'aestuosus' (burning, hot, seething), from 'aestus' (heat, tide, surge). Related to 'estuary' and earlier 'estuant.'
Estuous is a gorgeous obsolete adjective that medieval and Renaissance writers used for anything intensely heated—whether literally boiling water or metaphorically passionate emotions.
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