[u] (aux-v) (1) (after the imperfective form of certain verbs and adjectives) indicates speculation; (2) indicates will; (3) indicates invitation #63
[うち, uchi] (n, adj-no) (1) inside; within; (2) (also 裡) while; (3) among; amongst; between; (pn, adj-no) (4) (See 家・うち・2) we (referring to one's in-group, i.e. company, etc.); our; (5) my spouse; (n) (6) (arch) imperial palace grounds; (7) (arch) emperor; (pn, adj-no) (8) (ksb #232
[うぶ, ubu] (adj-na, n, adj-no) (1) (esp. 初, 初心) innocent; naive; unsophisticated; inexperienced; green; wet behind the ears; (n-pref) (2) (産, 生) birth- #250
[うけ, uke] (n) (1) popularity; favour; favor; reception; (2) defense; defence; reputation; (3) agreement; (4) receiver of technique (e.g. in martial arts); (5) (uk) (col) (See 猫・6, 攻め・2) submissive partner of a homosexual relationship; (P) #371
[うま, uma] (n) (1) horse; (2) promoted bishop (shogi); (P) #536
[うみ(P);み(ok);わた(ok);わだ(ok), umi (P); mi (ok); wata (ok); wada (ok)] (n) sea; beach; (P) #595
[うた, uta] (n) (1) (歌, 唄 only) (唄 is primarily used for shamisen songs) song; (2) (歌 only) (See 短歌) classical Japanese poetry (esp. tanka); (3) (歌, 詩 only) modern poetry; (P) #610
[うちゅう, uchuu] (n) universe; cosmos; space; (P) #826
[うまれ, umare] (n) birth; birthplace; (P) #844
[うんえい, un'ei] (n, vs) management; administration; operation; (P) #914