In a manner that involves drafts of air; in a way that is breezy, windy, or susceptible to air currents.
From 'drafty' plus the adverb suffix '-ly,' which converts adjectives into adverbs describing how something is done or happens.
Using an adverb like 'draftily' shows how English evolved to describe comfort in rooms—medieval people didn't need this word because they assumed castles were always freezing and drafty!
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