N5
ねる
Definition
to lie down, to go to bed, to lie in bed, to sleep (lying down), to sleep (with someone, i.e. have intercourse), to lie idle
N4
コンピュータ、コンピューター
N3
てつがく
Definition
philosophy
N2
ていきゅうび
Definition
regular holiday, fixed day off, regular closing day
N1
ごい
Definition
vocabulary, lexicon, lexis, terminology