Denshi Jisho — Online Japanese dictionary

古人 こじん ancient people
Noun 
狡い こすい 1: (Usually written using kana alone) sly; cunning; dishonest; sneaky; crafty;
2: miserly
Adjective 
鼓吹 こすい inspiration; advocacy; encouragement
Noun, Suru verb 
個数 こすう number of articles; quantity
Noun 
箇数 こすう number of articles; quantity
Noun 
小杉 こすぎ 1: (Abbreviation) (Archaism) small cedar;
2: thin Japanese paper (used as tissue during the Edo period)
Noun 
擦り こすり rubbing; scrubbing; scraping
Noun 
錯る こする to rub; to scrub
Out-dated kanji, Godan verb with ru ending, Transitive verb, Usually written using kana alone 
古制 こせい ancient establishment; ancient laws
Noun 
古聖 こせい ancient sage
Noun 
呼声 こせい call; hail; yell
Noun 
糊精 こせい dextrin
Noun 
古昔 こせき ancient times
Noun 
古跡 こせき historic spot; historic remains; ruins
Noun 
古蹟 こせき historic spot; historic remains; ruins
Noun 
古拙 こせつ artless but attractive in a quaint sense
Na-adjective, Noun 
古説 こせつ ancient belief
Noun 
古銭 こせん old coin
Noun 
姑洗 こせん 1: (in China) 5th note of the ancient chromatic scale (approx. F sharp);
2: third lunar month
Noun 
弧線 こせん arc (of a circle)
Noun 
小勢 こぜい a small force
Noun 
孤絶 こぜつ to become isolated; to become separated
Suru verb 
個装 こそう individual packaging; unit packaging
Noun 
古層 こそう layers of history
Noun 
古筝 こそう Guzheng (type of ancient Chinese zither)
Noun 
古箏 こそう Guzheng (type of ancient Chinese zither)
Noun 

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