| term | pronunciation | English |
|---|
| 古 | ふる・い、こ・う | old, used |
| 稽古 | けいこ | practice, training, study |
| 古典 | こてん | old book, classics, classic |
| 中古 | ちゅうこ | (1) used, second-hand, old |
| 古い | ふるい | old (not person), aged, ancient, antiquated |
| 古本 | ふるほん | a used book |
| 中古車 | 中古車 | a second-hand car |
| 古里 | ふるさと | home town, birthplace, old village, historic village |
| 亘古 | こうこ | for ever, from ancient times |
| 古び衰える | ふるびおとろえる | to waste away |
| 古代 | こだい | ancient times |
| 古典的 | こてんてき | classical, classic |
| 古城 | こじょう | old castle, old fortress |
| 古墳 | こふん | ancient (mound) tomb |
| 古墳時代 | こふんじだい | Tumulus period (of Japanese history) |
| 古巣 | ふるす | old haunts, former homes |
| 古希 | こき | age seventy |
| 古書 | こしょ | old book, rare book |
| 古池 | ふるいけ | old pool, old pond |
| 古稀 | こき | age seventy |
| 古色蒼然 | こしょくそうぜん | antique-looking, looking hoary with patina |
| 古豪 | こごう | veteran, old-timer, man of experience |
| 履き古し | はきふるし | worn-out shoes, worn-out socks |
| 懐古 | かいこ | recalling the old days, nostalgia, reminiscences |
| 最古 | さいこ | the oldest |
| 考古学 | こうこがく | archaeology, archeology |
| 閑古鳥 | かんこどり | cuckoo |