IPA: /ˈbɔːldɪŋ/
KK: /bɔldɪŋ/
Having little or no hair on the scalp, often as a result of aging or genetic factors.
He started balding in his early thirties, which made him look older than his age.
Balding → The word is derived from "bald" (from Old English *beald*, meaning having little or no hair) and the suffix "-ing" (indicating a process or action). The term "balding" refers to the process of becoming bald or losing hair.
Think of someone who is 'losing hair' — 'bald' means having little or no hair, and '-ing' indicates the action of that process.