N5
Definition
tree, shrub, bush, wood, timber
N4
すいえい
Definition
swimming
N3
ずいぶん
Definition
very, extremely, surprisingly, considerably, contemptible, reprehensible
N2
すきま
Definition
crevice, crack, gap, opening, spare moment, interval, break, pause, spare time, chink (in one's armor, armour), unpreparedness, carelessness
N1
ぎょうせい
Definition
administration