N5
かぜ、ふうじゃ
Definition
common cold, cold, influenza, flu, ague
N4
くうき
Definition
air, atmosphere, mood, situation, someone with no presence, someone who doesn't stand out at all
N3
うんてん
Definition
operation (of a machine, etc.), operating, running, run, driving, working (capital, etc.)
N2
おうせつ
Definition
reception
N1
いじゅう
Definition
migration, immigration