Denshi Jisho — Online Japanese dictionary

スイスイ (swim, work) smoothly; unhindered
Adverb, Adverb taking the 'to' particle, Onomatopoeic or mimetic word 
スイバル swivel
Noun 
スイフト swift ball
Noun, Abbreviation 
スイベル swivel
Noun 
スイレン 1: (Usually written using kana alone) water lily (any plant of genus Nymphaea);
2: pygmy waterlily (Nymphaea tetragona)
Noun 
スイーツ sweets (desserts, candy, etc.)
Noun 
スイープ sweep
Noun 
水域 すいいき waters; water area
Common word, Noun 
水泳 すいえい swimming
Common word, Noun, Suru verb, No-adjective 
水温 すいおん water temperature
Common word, Noun 
水害 すいがい water damage; flood disaster
Common word, Noun 
水銀 すいぎん mercury
Common word, Noun, No-adjective 
推計 すいけい estimate; estimation
Common word, Noun, Suru verb 
水系 すいけい drainage system
Common word, Noun 
水源 すいげん source of river; fountainhead
Common word, Noun 
推敲 すいこう 1: revision (manuscript); elaboration on;
2: polish; improvement
Common word, Noun, Suru verb 
遂行 すいこう accomplishment; execution
Common word, Noun, Suru verb 
水産 すいさん aquatic products; fisheries
Common word, Noun 
水質 すいしつ water quality
Common word, Noun 
水車 すいしゃ water wheel
Common word, Noun 
推進 すいしん 1: propulsion; driving force;
2: implementation; promotion (e.g. of a government policy)
Common word, Noun, Suru verb 
水深 すいしん depth of water
Common word, Noun 
彗星 すいせい comet
Common word, Noun 
水星 すいせい Mercury (planet)
Common word, Noun, No-adjective 
推薦 すいせん recommendation; referral; endorsement
Common word, Noun, Suru verb, No-adjective 
水仙 すいせん daffodil; narcissus; Narcissus tazetta var chinensis
Common word, Noun 

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