ETYM as. cele, cyle, from the same root as celan, calan, to be cold; akin to Dutch kil cold, coldness, Swed. kyla to chill, and Eng. cool. Related to Cold, Cool.
1. A sensation of cold that often marks the start of an infection and the development of a fever; SYN. shivering.
2. A sudden numbing dread; SYN. pall.
3. Coldness due to a cold environment; SYN. iciness, gelidity.

To depress or discourage

Uncomfortably cool; SYN. chilly.