忍者【にんじゃ】
ninja, person trained in ninjutsu and employed for covert purposes in feudal Japan
忍び込む【しのびこむ】
to creep in, to steal in, to sneak in
忍耐【にんたい】
endurance, perseverance, patience
忍ぶ【しのぶ】
to conceal oneself, to hide, to endure, to bear, to stand, to put up with
残忍【ざんにん】
brutal, cruel, merciless, ruthless, cold-blooded
忍び寄る【しのびよる】
to creep, to steal up, to draw near unnoticed
堪忍袋【かんにんぶくろ】
one's store of patience
忍び【しのび】
stealth, travelling incognito (traveling), ninjutsu, ninja, sneak theft, sneak thief, tolerance