stealth; travelling incognito (traveling); ninjutsu; ninja; sneak theft; sneak thief; tolerance
bamboo wall-top spikes (or wood, iron); spikes placed at the top of a wall to repel thieves
to creep in; to steal in; to sneak in
silent clap (done during a funeral or during certain rites at the Ise Grand Shrine)
clandestine meeting (e.g. for lovers); rendezvous; tryst; secret meeting