onomastic (adj.) onnagata (n.) only (adj.) only adv.只有；仅仅；刚刚adj.最好的；唯一的；出众的conj.但是；除非；然而；毕竟onlooker (n.) online (adj., adv.) oniony (adj.) onion (n.) onion n.洋葱（头）ongoing (adj.) oneself pron. 自己；亲自；（不受他人影响的）自己onerous (adj.) oneness (n.) oneiromancy (n.) oneirocritical (adj.) oneirocritic (n.) oneiro- [医] 梦oneiric (adj.) one-way (adj.) one-upsmanship (n.)