noun
spraying; misting
Refers to the action of spraying a fine mist of liquid, often using a spray bottle or atomizer.
観葉植物に霧吹きをする。
I mist the houseplants.
霧吹きに水を入れてください。
Please put water in the spray bottle.
スプレー is a broader loanword for spray (aerosol, pump spray, or the act of spraying). 霧吹き specifically suggests a fine mist from a manual pump bottle.
Compound of 霧 (kiri, 'mist') + 吹き (fuki, 'blowing'), from the verb 吹く (fuku, 'to blow'). Literally 'mist-blowing'.