oni — 和英／英和辞典

鬼【おに、き】 (oni) (P) [n] ogre; demon; oni; [n] spirit of a deceased person; [n] ogre-like person (i.e. fierce, relentless, merciless, etc.) (+3) (kanji info)

お兄さん（御兄さん）【おにいさん】 (oniisan) (P) [n] older brother; elder brother; [n] young man; buddy; fella; laddie (kanji info)

オニオン (onion) (P) [n] onion (Allium cepa)

鬼ごっこ【おにごっこ】 (onigokko) (P) [n] tag (children's game); tig (kanji info)

鬼神【きしん、きじん、おにがみ】 (kishin) (P) [n] fierce god (kanji info)

お握り（御握り）【おにぎり】 (onigiri) [n] onigiri; rice ball (often triangular, sometimes with a filling and wrapped in nori) (kanji info)

お兄ちゃん（御兄ちゃん）【おにいちゃん】 (oniichan) [n] (one's) older brother; [n] lad; sonny (kanji info)

オニキス（オニックス） (onikisu) [n] onyx

鬼火【おにび】 (onibi) [n] will-o'-the-wisp; ignis fatuus (kanji info)

鬼瓦【おにがわら】 (onigawara) [n] decorative ridge-end tile (traditionally bearing the face of a demon and resembling a gargoyle); [n] hideous face (kanji info)

鬼婆（鬼ばば、鬼ばばあ）【おにばば、おにばばあ】 (onibaba) [n] hag; witch; bitch; penurious or spiteful old woman; termagant; virago (kanji info)

鬼歯【おにば】 (oniba) [n] protruding tooth (like a fang) (kanji info)

鬼子（鬼っ子）【おにご、おにっこ】 (onigo) [n] child born with teeth; [n] child which does not resemble its parents; changeling; [n] wild child; badly-behaved child (kanji info)

鬼百合【おにゆり、オニユリ】 (oniyuri) [n] tiger lily (Lilium lancifolium) (kanji info)

鬼ヶ島（鬼が島、鬼ケ島）【おにがしま】 (onigashima) [n] Onigashima; island of ogres (in Japanese folklore) (kanji info)

鬼蓮【オニバス、おにばす】 (onibasu) [n] prickly waterlily (Euryale ferox) (kanji info)

鬼刑事【おにけいじ】 (onikeiji) [n] crack detective (kanji info)

鬼武者【おにむしゃ】 (onimusha) [n] daredevil warrior (kanji info)

鬼胡桃【おにぐるみ、オニグルミ】 (onigurumi) [n] Manchurian walnut (Juglans mandshurica) (kanji info)

鬼課長【おにかちょう】 (onikachou) [n] unsympathetic manager; section chief with a heart of stone (kanji info)

鬼将軍【おにしょうぐん】 (onishougun) [n] lion-hearted general (kanji info)

鬼海星【おにひとで、オニヒトデ】 (onihitode) [n] crown-of-thorns starfish (Acanthaster planci) (kanji info)

鬼の首を取ったよう【おにのくびをとったよう】 (oninokubiwotottayou) [exp, adj-na] triumphant (over a mediocre achievement); boastful; as if one had grabbed a demon by the neck (kanji info)

お兄系（おにい系、オニイ系）【おにいけい、オニイけい】 (oniikei) [n] men's fashion style characterized by brown hair and deep-tanned skin, expensive brand-name clothes and accessories (kanji info)

鬼の目にも涙【おにのめにもなみだ】 (oninomenimonamida) [exp] even the hardest of hearts can be moved to tears; a tear in the ogre's eye (kanji info)

鬼に金棒【おににかなぼう】 (oninikanabou) [exp] making something strong even stronger; solidifying something's chances; (giving) a metal rod to an ogre (kanji info)

鬼も十八番茶も出花【おにもじゅうはちばんちゃもでばな】 (onimojuuhachibanchamodebana) [exp] just as even coarse tea tastes good when fresh, even homely girls look beautiful at the peak of their youth (kanji info)

鬼のいぬまに洗濯（鬼の居ぬ間に洗濯、鬼のいぬ間に洗濯）【おにのいぬまにせんたく】 (oninoinumanisentaku) [exp] playing while the cat is away; taking a break while the boss is out; doing what one wants when one is (finally) alone; relaxing while the demon is out (kanji info)

鬼頭（纛）【おにがしら、とう】 (onigashira) [n] decorative black flagpole tassel made from tail hair (of a yak, horse, ox, etc.) or dyed hemp (kanji info)

鬼郭公【おにかっこう、オニカッコウ】 (onikakkou) [n] Asian koel (Eudynamys scolopacea) (kanji info)

鬼魣【おにかます、オニカマス】 (onikamasu) [n] great barracuda (Sphyraena barracuda) (kanji info)

鬼蜻蜓（馬大頭）【オニヤンマ、おにやんま】 (oniyanma) [n] Siebold's dragonfly (Anotogaster sieboldii); jumbo dragonfly (kanji info)

鬼蜘蛛【おにぐも、オニグモ】 (onigumo) [n] Araneus ventricosus (species of orb-weaving spider) (kanji info)

尾肉【おにく】 (oniku) [n] whale tail (kanji info)

鬼が出るか蛇が出るか【おにがでるかじゃがでるか】 (onigaderukajagaderuka) [exp] God only knows what may happen (kanji info)

鬼が出るか仏が出るか【おにがでるかほとけがでるか】 (onigaderukahotokegaderuka) [exp] God only knows what may happen (kanji info)

鬼糸巻鱝（鬼糸巻鱏）【オニイトマキエイ、おにいとまきえい】 (oniitomakiei) [n] oceanic manta ray (Manta birostris); giant oceanic manta ray (kanji info)

鬼鼠【おにねずみ、オニネズミ】 (oninezumi) [n] greater bandicoot rat (Bandicota indica) (kanji info)

鬼の矢幹【おにのやがら、オニノヤガラ】 (oninoyagara) [n] Gastrodia elata (species of saprophytic orchid) (kanji info)

お荷物（御荷物）【おにもつ】 (onimotsu) [n] baggage; luggage; [n] burden; albatross around one's neck; excess baggage (kanji info)

鬼田平子【おにたびらこ、オニタビラコ】 (onitabirako) [n] Oriental false hawksbeard (Youngia japonica) (kanji info)

オニハタタテダイ (onihatatatedai) [n] masked bannerfish (Heniochus monoceros); pennant coralfish

オニベニハゼ (onibenihaze) [n] Trimma yanagitai (species of goby)

鬼カサゴ【おにカサゴ、オニカサゴ】 (onikasago) [n] scorpionfish (Scorpaenopsis cirrhosa); hairy stingfish (kanji info)

オニテングハギ (onitenguhagi) [n] humpback unicornfish (Naso brachycentron, species of Indo-Pacific tang)

鬼星【おにぼし】 (oniboshi) [n] Chinese "ghost" constellation (one of the 28 mansions) (kanji info)

鬼板【おにいた】 (oniita) [n] wooden board used on the ridge-ends of a roof instead of an onigawara tile (sometimes covered in copper sheeting) (kanji info)

鬼坊主鱚【おにぼうずぎす、オニボウズギス】 (onibouzugisu) [n] black swallower (Chiasmodon niger) (kanji info)

鬼達磨鰧（鬼達磨虎魚）【おにだるまおこぜ、オニダルマオコゼ】 (onidarumaokoze) [n] reef stonefish (Synanceia verrucosa); stonefish; devilfish (kanji info)

鬼金目【おにきんめ、オニキンメ】 (onikinme) [n] common fangtooth (Anoplogaster cornuta) (kanji info)