Characterized by or tending to cause a chill; cold, cool, or having a somewhat eerie or unsettling quality.
Formed from 'chill' (Old English 'ciele') plus the Middle English suffix '-some' (meaning 'characterized by' or 'tending to,' from Old English 'sum'). This creates an adjective meaning 'inclined toward chilliness' or 'having chill-like qualities,' blending both physical coldness and emotional coolness.
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