N5
すう
Definition
to smoke, to breathe in, to inhale, to suck, to sip, to slurp, to absorb, to soak up, to kiss
N4
だいじ、おおごと
Definition
important, valuable, serious matter
N3
かのう
Definition
potential, possible, practicable, feasible
N2
がっか
Definition
study subject, course of study, department (university, etc.)
N1
えいせい
Definition
health, hygiene, sanitation, medical