Having no fear; brave and confident in facing danger, pain, or difficulty. Characterized by courage and boldness in action or attitude.
From Middle English fereles, composed of 'fear' (from Old English fǣr meaning sudden danger) plus the suffix '-less' meaning without. The combination literally means 'without fear' and has maintained this meaning since the 14th century.
The word fearless is beautifully paradoxical - it's defined by what it lacks rather than what it possesses. Psychologically, true fearlessness isn't the absence of fear but the ability to act despite it, making this word a fascinating study in how we conceptualize courage.
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