1. frigid, gelid, frozen, freezing. Cold, chill, chilly, cool refer to various degrees of absence of heat. Cold refers to temperature possibly so low as to cause suffering: cold water. Chill suggests a penetrating cold which causes shivering and numbness: There was a chill wind blowing. Chilly is a weaker word, though it also connotes shivering and discomfort: a chilly room. Cool means merely somewhat cold, not warm: cool and comfortable. All have figurative uses. 4. indifferent, uninvolved, cool, unconcerned, imperturbable. 5. apathetic, unsympathetic, unfeeling, heartless, polite, formal, reserved, unfriendly, inimical, hostile. 7. uninspiring, dull. 8. calm, deliberate.