Chillily is an adverb that means coldly or with a lack of warmth or friendliness. Synonyms for chillily include frigidly, icily, unfriendly, aloof, coolly, distantly, detachedly, standoffish, unsympathetically, unemotionally, and unaffectionate. These words describe behavior that is cold and indifferent, lacking in warmth or empathy. Chillily can also be used to describe the weather, such as a cold, frosty day. When using synonyms for chillily, it's important to consider the context in which the word is being used to ensure that the meaning is clear and accurate.