certitude
UK: /ˈsɜːtɪtjuːd/ | US: /ˈsɜːrtɪtuːd/
n. absolute certainty or conviction
n. the state of being free from doubt
The word "certitude" stems from Latin certitudo, derived from certus (meaning "sure" or "settled"). The morpheme cert retains its core meaning of certainty, while -itude (a suffix borrowed from Latin -itudo) forms abstract nouns denoting a state or quality. Over time, "certitude" evolved in Middle English via Old French, preserving its original sense of unwavering confidence or truth. The logical progression reflects how certainty (cert) becomes a formalized state (-itude).
She spoke with such certitude that no one dared to question her.
His certitude about the outcome made him overlook potential risks.
Scientific discoveries often challenge our certitudes.
The philosopher sought certitude in a world of doubt.
Blind certitude can hinder open-minded inquiry.