Denshi Jisho — Online Japanese dictionary

性 せい 1: nature (of a person);
2: sex;
3: gender;
4: (Suffix) -ty; -ity; -ness; -cy
Common word, Noun 
性 さが 1: one's nature; one's destiny;
2: custom; tradition; habit
Noun 
性 しょう 1: nature (of a person or thing);
2: (Buddhist term) that which does not change according to external influences
Noun, Noun suffix 
異性 いせい the opposite sex
Common word, Noun, No-adjective 
個性 こせい individuality; personality; idiosyncrasy
Common word, Noun 
惰性 だせい inertia; habit; momentum
Common word, Noun 
知性 ちせい intelligence
Common word, Noun 
母性 ぼせい motherhood; maternity
Common word, Noun, No-adjective 
野性 やせい wildness (plants, animals, etc.); uncouth; rough; unpolished
Common word, Noun, No-adjective 
理性 りせい reason; sense
Common word, Noun 
仮性 かせい false (symptoms)
Noun, No-adjective 
苛性 かせい caustic
Noun, No-adjective 
記性 きせい memory
Noun, Obscure term 
偽性 ぎせい pseudo; fake; imitation
Na-adjective, No-adjective, Prefix 
悟性 ごせい wisdom; understanding
Noun 
資性 しせい one's nature or disposition
Noun 
雌性 しせい female
Na-adjective, Noun 
磁性 じせい magnetism
Noun 
性器 せいき genital
Noun, No-adjective 
性具 せいぐ sex toy; sex aid
Noun 
性差 せいさ sex difference
Noun 
性比 せいひ sex ratio
Noun 
塑性 そせい plasticity
Noun 
父性 ふせい paternity
Noun, No-adjective 
負性 ふせい negative properties
Noun 
賦性 ふせい nature
Noun 

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