1 (two, three etc) -fold

2 times (multiplier)

3 double

4 to increase or multiply

1 weaponry

2 weapons

3 arms

1 sharp weapon

2 effective implement

3 outstandingly able individual

1 to double

2 to redouble

1 device

2 tool

3 utensil

4 classifier: 台 tái

1 spare the rod and spoil the child (idiom)

1 half the work, twice the effect (idiom); the right approach saves effort and leads to better results

2 a stitch in time saves nine

1 brimming with confidence (idiom)

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

1 To do a good job, an artisan needs the best tools (idiom). Good tools are prerequisite to the successful execution of a job