1 to demand

2 to request

3 to coerce

1 main

2 principal

3 major

4 primary

1 event

2 happening

3 incident

4 classifier: 个 gè

1 item

2 component

3 classifier for events, things, clothes etc

1 to recharge (money onto a card)

1 don't insist on only taking one road to Rome (idiom)

2 there's more than one way to skin a cat

1 to block one's ears and not listen (idiom); to turn a deaf ear

1 to allay one's hunger and slake one's thirst (idiom)

1 a blade will get rusty if it is not sharpened; a man will fall behind if he doesn't study (idiom)

1 to hit the target and do real damage (idiom)

2 fig. to hit where it hurts

3 fig. to hit home

4 an argument that hits the nail on the head