bald
v. B2 Upper Intermediate US //ˈbɔɫd// UK //bˈɔːld// bald
v. to lose your hair over time. You use this when someone is slowly becoming bald.
v. to become bald by losing hair from the scalp. Intransitive — describes a progressive physiological process.
He started to bald in his early twenties.
Many men in his family began to bald prematurely, so he was not surprised when his own hair started thinning.
The actor chose to shave his head entirely rather than let the audience watch him slowly bald over the course of the three-season television series.
Usage
The verb is intransitive and does not take a direct object.
Pitfall
He is balding his hairHe is baldingBald is an intransitive verb describing a state change of the person, not an action performed on the hair.