The important thing is to greet them properly.
Logging onto WaniKani and doing your reviews every day is very important for your Japanese learning.
Taking time to relax is important.
A big action means something big is going down. This is no ordinary action. It is an action that is important.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.