impair
im|pair /ɪmp'eər/ (impairs impairing impaired)
[VERB] V n
If something impairs something such as an ability or the way something works, it damages it or makes it worse. (FORMAL)
Consumption of alcohol impairs your ability to drive a car or operate machinery...
● impaired [ADJ]
The blast left him with permanently impaired hearing.
[VERB] V n
If something impairs something such as an ability or the way something works, it damages it or makes it worse. (FORMAL)
Consumption of alcohol impairs your ability to drive a car or operate machinery...
● impaired [ADJ]
The blast left him with permanently impaired hearing.