シュ、ス

まも.る、まも.り、もり、-もり、かみ

守, 宀, 冖, 寸

guard, protect, defend, obey

保守(ほしゅ): maintenance; conservation
守備(しゅび): defense; defence
守る(まもる): (1) to protect; to guard; to defend (2) to keep (i.e. a promise); to abide (by the rules); to observe; to obey; to follow
留守(るす): (1) absence; being away from home (2) house-sitting; house-sitter (3) being left unattended to (of one's studies, etc.); neglecting
留守番(るすばん): (1) care-taking; house-sitting; house-watching (2) caretaker; house-sitter
守衛(しゅえい): security guard; doorkeeper