1 difference

2 discrepancy

3 to differ

4 error

5 to err

6 to make a mistake

1 speed

2 rate

3 velocity

4 (music) tempo

5 classifier: 个 gè

1 battery charger

1 the speed of light

1 weaponry

2 weapons

3 arms

1 spare the rod and spoil the child (idiom)

1 lit. speed is a crucial asset in war (idiom)

2 fig. swift and resolute (in doing sth)

1 (idiom) variable

2 uneven

3 irregular

1 uneven and jumbled (idiom); irregular and disorderly

2 in a tangled mess

1 lit. it takes a long time to make a big pot (idiom); fig. a great talent matures slowly

2 in the fullness of time a major figure will develop into a pillar of the state

3 Rome wasn't built in a day