1 classroom

2 classifier: 间 jiān

1 fault

2 defect

3 shortcomings

4 ailment

5 classifier: 个 gè

1 to fall ill

1 disease

2 sickness

3 ailment

1 illness

2 classifier: 场 cháng

3 disease

4 to fall ill

5 defect

1 to fall gravely ill, never to recover (idiom)

1 to be discontented with one's home

2 to have adulterous relations after marriage (of women) (idiom)

1 long illness makes the patient into a good doctor (idiom)

1 to hit the target where it hurts (idiom); fig. to hit home

2 to hit the nail on the head (in an argument)

1 lit. to reach the main room and enter the chamber (idiom)

2 fig. to gradually attain proficiency

3 to attain a higher level