N5
きょうしつ
Definition
classroom, department, laboratory, single-room school, small school
N4
せいさん
Definition
production, manufacture
N3
ずっと、ずーっと、ずうっと
Definition
continuously in some state (for a long time, distance), throughout, all along, the whole time, all the way, much (better, etc.), by far, far and away, far away, long ago, direct, straight
N2
ずのう
Definition
head, brains, intellect, understanding
N1
くぐる
Definition
to go under, to pass under, to go through, to pass through, to dive (into or under the water), to evade, to get around, to slip past, to survive, to surmount