How to express compulsion in Russian

Did you know that there are several ways in Russian to talk about things you need to do but don’t really want to?

For example:

Я вынуждена была уволиться. I was forced to quit.

Ему придётся оплатить полную стоимость. He will have to pay the full price.

Они должны ответить за содеянное. They must answer for what they have done.