IPA: /ˈlʌŋfəl/
KK: /ˈlʌŋfəl/
The amount of air that can be held in the lungs at one time.
He took a deep lungful of fresh air before diving into the water.
Lungful → It is formed from "lung" (from Old English "lungen", meaning the organ of respiration) and "-ful" (meaning full of). The word "lungful" means a quantity of air that fills the lungs.
Think of the word 'lung' as the organ that holds air, and '-ful' means full of — so a lungful is a full amount of air that your lungs can take in.