N3 - 開始かいし
start, commencement, beginning
N3 - 始まりはじまり
origin, beginning
N2 - 原始げんし
origin, primeval
N2 - 始終しじゅう
continuously, from beginning to end
N1 - 始末しまつ
management, dealing, settlement, cleaning up afterwards
N1 - 終始しゅうし
beginning and end, from beginning to end, doing a thing from beginning to end
N1 - 始めはじめ
beginning, start, origin