Denshi Jisho — Online Japanese dictionary

制 せい system; organization; organisation; imperial command; laws; regulation; control; government; suppression; restraint; holding back; establishment
Common word, Noun, Noun suffix 
姓 せい 1: surname; family name;
2: hereditary title (used in ancient Japan to denote rank and political standing)
Common word, Noun 
性 せい 1: nature (of a person);
2: sex;
3: gender;
4: (Suffix) -ty; -ity; -ness; -cy
Common word, Noun 
正 せい 1: (logical) true; regular;
2: 10^40;
3: (Abbreviation) original;
4: (Mathematical term) positive; greater than zero
Common word, Noun, No-adjective 
精 せい 1: spirit; sprite; nymph;
2: energy; vigor (vigour); strength;
3: fine details;
4: semen
Common word, Noun 
背 せい height; stature
Common word, Noun 
製 せい -made; make
Common word, Noun, Noun suffix 
剤 ざい medicine; agent; (chemical) substance; drug; dose
Noun suffix 
世 せい 1: counter for generations;
2: () (geological) epoch
Counter 
井 せい 1: (Obscure term) well curb;
2: Chinese "Well" constellation (one of the 28 mansions)
Noun 
勢 せい 1: energy;
2: military strength
Noun 
斉 せい Qi (kingdom in China during the Spring and Autumn Period and the Period of the Warring States); Ch'i
Noun 
旌 せい flag (esp. originally a flagpole-topping streamer made of feathers)
Noun 
星 せい Chinese "star" constellation (one of the 28 mansions)
Noun 
生 せい 1: life; living;
2: () (Male term or language) (Humble (kenjougo) language) I; me; myself
Noun 
聖 せい 1: Saint; St.; S.;
2: () sacred; holy; pure
Noun, Noun prefix 
脊 せい height; stature
Noun 
西 せい Spain
Noun, Abbreviation 
齊 せい Qi (kingdom in China during the Spring and Autumn Period and the Period of the Warring States); Ch'i
Noun 
所為 せい cause; reason; fault
Common word, Noun, Usually written using kana alone 
せいご juvenile Japanese sea perch (under two years of age and 25 cm in length)
Noun, Usually written using kana alone 
セイゴ juvenile Japanese sea perch (under two years of age and 25 cm in length)
Noun, Usually written using kana alone 
セイジ sage
Noun, No-adjective 
誠意 せいい sincerity; good faith
Common word, Adverbial noun, Noun 
成果 せいか fruits (of one's labors); results
Common word, Noun 
生家 せいか (parents') home
Common word, Noun 

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