Superlative form of courtly; the most courtly, refined, and elegant; most befitting court life; exhibiting the highest degree of courtly virtue.
From 'courtly' + the superlative suffix '-est,' used to indicate the highest degree of a quality (most courtly of all).
The superlative 'courtliest' was the ultimate compliment in Renaissance society—saying someone was 'the courtliest gentleman' meant they perfectly embodied everything refined, graceful, and sophisticated about court culture!
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