N5
かぎ、カギ
Definition
key, lock
N4
しっかり
Definition
tightly (holding on), firmly, securely, strongly (built), solidly, sturdily, steadily, properly, well, sufficiently, hard (working, etc.), fully, completely, reliably, dependably, levelheadedly, shrewdly, wisely, cleverly
N3
しんこう
Definition
(religious) faith, belief, creed
N2
しんや
Definition
late at night
N1
きれめ
Definition
break, pause, gap, end, rift, interruption, cut, section, notch, incision, end (of a task)