To Chill Something
To Chill
transitive verb, godan verb
冷たい is "cold." This is the verb version, so you're making something cold. This word is to chill something.
To chill something, you need to apply cold, not heat (ひ).
指をドアで挟んじゃって、今氷で冷やしてるの。
My finger got caught in the door and I’m chilling it with ice now.