In a strut or strutting posture; standing with an air of pride or confidence, often appearing arrogant or self-important.
From a- (in a state of) combined with strut (to walk proudly). Archaic or literary usage, following patterns like 'afoot' or 'astir' where 'a-' indicates a state or condition.
The prefix 'a-' in words like astrut, afoot, and asleep comes from Old English and still signals a state or condition—it's why we say a house is 'ablaze' (in a blaze) rather than 'on blaze.'
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