忍び忍び

しのびしのび

stealthily

忍び

しのび

stealth

忍び足

しのびあし

stealthy steps, soft steps

忍び声

しのびごえ

whispering

忍び手

しのびで

silent clap (done during a funeral or during certain rites at the Ise Grand Shrine)

忍び刀

しのびがたな

Ninja sword

お忍び

おしのび

travelling incognito (traveling)

忍び返し

しのびがえし しのびかえし

bamboo wall-top spikes (or wood, iron), spikes placed at the top of a wall to repel thieves

忍び込む

しのびこむ

to creep in, to steal in

忍び笑い

しのびわらい

stifled laugh, chuckling, snickering

忍び寄る

しのびよる

to creep, to steal up, to draw near unnoticed

忍び入る

しのびいる しのびはいる

to steal or sneak or slip into

忍び逢い

しのびあい

clandestine meeting, rendezvous, tryst, secret meeting (e.g. for lovers)

忍び泣く

しのびなく

to shed silent tears

忍び難い

しのびがたい

intolerable, unbearable

忍びの術

しのびのじゅつ

art of stealth (i.e. ninjutsu)

忍びやか

しのびやか

stealthy, secret

忍び泣き

しのびなき

quiet weeping

忍び出る

しのびでる

to sneak out; to slip out; to slip away; to leave secretly