[ない, nai] (adj-i) (1) (uk) (See 亡い) nonexistent; not being (there); (2) unpossessed; unowned; not had; (3) (See またとない) unique; (4) (as ...ことがない, etc.) indicates negation, inexperience, unnecessariness or impossibility; (aux-adj) (5) (See ない) (after the ren'youkei form of an adjective) not ...; (6) (after the -te form of a verb) to not be...; to have not ...; (P) #952
[とくしゅ, tokushu] (adj-na, n, adj-no) special; unique; (P) #1662
[ゆいいつ(P);ゆいつ(P), yuiitsu (P); yuitsu (P)] (adj-no, adv) only; sole; unique; (P) #1746
[ことなり, kotonari] (adj-f) unlike; unique; unusual #2681
[いちい, ichii] (adj-na, adv, n) (1) unique; (2) earnestness #3282
[どくとく, dokutoku] (n, adj-no, adj-na) peculiarity; uniqueness; characteristic; (P) #5954
[こうほう, kouhou] (n) official bulletin; communique; (P) #7636
[とくい, tokui] (adj-na, n, adj-no) unique; singular; (P) #7744
[いちりゅう, ichiryuu] (adj-no, n) (1) first-class; top grade; foremost; top-notch; leading; (2) characteristic; peculiar; unique; (n) (3) school (e.g. of a performance art); (4) (also written as 一旒) one flag; one banner; one streamer; (P) #11584
[ひとあじ, hitoaji] (adv, n) unique or peculiar flavor (flavour) #13879