1 to demand

2 to request

3 to coerce

1 to need

2 to want

3 to demand

4 to require

5 requirement

6 need

1 main

2 principal

3 major

4 primary

1 if only

2 so long as

1 necessary

2 essential

3 indispensable

4 required

1 lit. to fight it out with sb to see who is best (idiom)

2 fig. to cross swords with

3 to lock horns

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

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

1 can't recognize tall or short (idiom); doesn't know what's what

1 to feel unconcerned and let matters rest (idiom)

1 man seeks his way up just as water seeks its way down (idiom)

2 one should constantly strive to make progress