1. 损害；损伤；障碍
If someone has an impairment, they have a condition which prevents their eyes, ears, or brain from working properly.

1. the act of making something futile and useless (as by routine)

Synonym: stultificationconstipationdeadening

2. damage that results in a reduction of strength or quality

3. the occurrence of a change for the worse

Synonym: damageharm

4. the condition of being unable to perform as a consequence of physical or mental unfitness

e.g. reading disability
hearing impairment

Synonym: disabilitydisablementhandicap

5. a symptom of reduced quality or strength

Synonym: deterioration