Eh, well I would just put this in the questions sticky but I already had a topic...

Anyway,
I saw an adjective end with -manakerya, which means what? I have an idea but I don't have any way to check that, so...

Is -beki the proper thing to use to say someone should do something?

Which is a better way to say you need something? Iru(要る) or Hitsuyou(必要)? Or, what's the difference?