1 lapse

2 mistake

3 to make a mistake

4 fault

5 service fault (in volleyball, tennis etc)

1 mistake

2 error

3 to miss

4 to harm

5 to delay

6 to neglect

7 mistakenly

1 to misunderstand

2 to mistake

3 misunderstanding

4 classifier: 个 gè

1 to misunderstand

2 to misread

3 misunderstanding

1 error

2 mistake

3 classifier: 个 gè

4 mistaken

5 false

6 wrong

1 lit. sharpening the axe won't make the wood-splitting take longer (idiom)

2 fig. time invested in preparations is not lost

3 a beard well lathered is half shaved

1 a clever person may become the victim of his own ingenuity (idiom); cleverness may overreach itself

2 too smart for one's own good

1 to create trouble for oneself (idiom)

1 to take a wrong step in life (idiom)

2 to go astray

1 lit. to foster an ulcer and bequeath a calamity (idiom); tolerating budding evil can only lead to disaster

2 to cherish a viper in one's bosom