Denshi Jisho — Online Japanese dictionary

ウオッシュ wash
Noun, Suru verb 
ウオーカー walker
Noun 
ウオーター water
Noun 
ウオーデン warden
Noun 
ウオーマー warmer
Noun 
ウキヤガラ Scirpus yagara (species of club-rush)
Noun, Usually written using kana alone 
ウグイスナ young greens (of mizuna, Japanese mustard spinach, rape, etc.)
Noun 
うざっこい jumbled up; confused; frustrating
Adjective 
うざったい 1: (Colloquialism) annoying; noisy;
2: strict
Adjective 
ウシガエル American bullfrog (Lithobates catesbeianus)
Noun, Usually written using kana alone 
ウシツツキ oxpecker
Noun, Usually written using kana alone 
ウスバハギ unicorn leatherjacket (Aluterus monoceros)
Noun, Usually written using kana alone 
ウチワエビ fan lobster (Ibacus spp., esp. the Japanese fan lobster, Ibacus ciliatus); sand crayfish
Noun, Usually written using kana alone 
ウッディー woody
Noun 
ウツボグサ common self-heal (Prunella vulgaris subsp. asiatica); common selfheal
Noun, Usually written using kana alone 
うながっぱ 1: maki sushi typically made from eel and cucumber, often with a face-like pattern when cut;
2: mascot character used by Tajimi City in Gifu
Noun 
ウバヒガン double weeping rosebud cherry (Prunus pendula)
Noun, Usually written using kana alone, Obscure term 
ウバメガシ ubame oak (Quercus phillyraeoides)
Noun, Usually written using kana alone 
ウマゴヤシ 1: toothed medick (Medicago polymorpha); hairy medick; bur clover;
2: (Colloquialism) white clover (Trifolium repens)
Noun 
ウミガラス common murre; common guillemot (Uria aalge)
Noun, Usually written using kana alone 
ウミケムシ Chloeia flava (species of bristle worm)
Noun, Usually written using kana alone 
ウミサソリ eurypterid
Noun, Usually written using kana alone 
ウミスズメ 1: (Usually written using kana alone) murrelet (esp. the ancient murrelet, Synthliboramphus antiquus);
2: roundbelly cowfish (Lactoria diaphana)
Noun 
うみたなご sea chub (Ditrema temminckii temminckii)
Noun, Usually written using kana alone 
ウミタナゴ sea chub (Ditrema temminckii temminckii)
Noun, Usually written using kana alone 
ウミツバメ storm petrel (any bird of family Hydrobatidae)
Noun, Usually written using kana alone 

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