In a damp, sticky, and unpleasantly moist manner.
From 'clammy' plus the adverbial suffix '-ly,' which converts adjectives to adverbs describing how an action is performed or a state exists.
Adverbs like 'clammily' help writers create vivid physical sensations—when a character's hand clammily grasps another's, you immediately feel the nervous tension and discomfort without needing extra explanation.
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