声を忍ばせて

こえをしのばせて

in a subdued voice

忍

しのぶ にん

endurance, forbearance, patience, self-restraint

足音を忍ばせて

あしおとをしのばせて

with stealthy steps; with noiseless footsteps; on tiptoe; stealthily

忍び忍び

しのびしのび

stealthily

忍び入る

しのびいる しのびはいる

to steal or sneak or slip into

忍び寄る

しのびよる

to creep, to steal up, to draw near unnoticed

忍び出る

しのびでる

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

中忍

ちゅうにん

ninja commander

上忍

じょうにん

Ninja clan master, highest-ranking ninja

押忍

おっす おす

greeting used between close male friends, Hi!, yes sir!, yo!

忍冬

すいかずら スイカズラ

Japanese honeysuckle (Lonicera japonica)

忍耐

にんたい

endurance, perseverance, patience

忍術

にんじゅつ

ninja skills in secrecy

隠忍

いんにん

patience, endurance

軒忍

のきしのぶ ノキシノブ

Lepisorus thunbergiana (species of fern)

忍者

にんじゃ

ninja (persons in feudal Japan who used ninjutsu for the purposes of espionage, assassination, sabotage, etc.)

忍法

にんぽう

ninja arts

堪忍

かんにん

pardon, patient endurance, forbearance, forgiveness

受忍

enduring (hardships, inconveniences, etc.); tolerating; accepting