IPA: /ˈθɜːrmɪk/
KK: /ˈθɜrmɪk/
Relating to heat or temperature.
The thermic properties of the material help it retain warmth.
Thermic is derived from "therm" (from Greek "thermos", meaning heat) and the suffix "-ic" (meaning pertaining to). The word "thermic" refers to something that is related to or characterized by heat.
Think of 'therm' meaning heat, and remember that 'thermic' relates to anything that has to do with heat.