忍 - endure, bear, put up with

ninja; person trained in ninjutsu and employed for covert purposes in feudal Japan

to conceal oneself; to hide

endurance; perseverance; patience

brutal; cruel; merciless; ruthless; cold-blooded

to conceal; to hide

stealthy steps; soft steps

to creep in; to steal in; to sneak in

ninja arts

ninjutsu; combat and stealth techniques used by ninja for espionage, sabotage, assassination, etc.

endurance; stoicism

whispering

stifled laugh; chuckling; snickering