To make a long, low, creaking sound, like wood bending or a door opening slowly, or the sound itself.
From Middle English 'creken,' likely imitative in origin, related to the Dutch 'kraken.' The sound-word has been used since at least the 1400s.
Creaks are mysterious because our brains are tuned to notice them—an unexpected creak can feel sinister even though it's just wood expanding with temperature, which is why horror movies weaponize this perfectly normal sound against our instincts.
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