Vocabulary consisting only from characters you are able to read
忍び
しのび
(1)stealth, (2)(abbr) travelling incognito (traveling), (3)(abbr) ninjutsu, (4)(abbr) ninja, (5)sneak theft, sneak thief, (6)tolerance mix
何れ
いずれ
(1)(uk) where, which, who, (2)anyway, anyhow, at any rate, sooner or later, eventually, at some future date or time; (adv,pn,adj-no) (3)(uk) where, which, who, (4)anyway, anyhow, at any rate, soon mix