IPA: /ˈlʌŋləs/
KK: /lʌŋləs/
Describing an organism or creature that does not have lungs.
Some species of amphibians are lungless and breathe through their skin instead.
Lungless → It is formed from "lung" (from Old English "lungen", meaning the organ of respiration) and "-less" (meaning without). The word "lungless" describes a condition of being without lungs.
Think of being 'without' ('-less') the 'organ of respiration' ('lung') — that's why lungless means lacking lungs.