御古[ofuru] used article (esp. clothes)
手古摺る[tekozuru] to have much trouble
土耳古[toruko] Turkey
下稽古[shitageiko] rehearsal
懐古[kaiko] recalling the old days

擬古[giko] imitation of classical styles
擬古文[gikobun] classical style
稽古[keiko] practice
遠古登点[wokototen] marks to aid in reading Chinese classics
古え[inishie] antiquity

遺跡[iseki] historic ruins (remains, relics)
刈り跡[kariato] cut-over land
監査証跡[kansashouseki] audit trail
奇跡的[kisekiteki] miraculous
軌跡[kiseki] tire track

形跡[keiseki] traces
跡始末[atoshimatsu] settlement (of affairs)
跡片付け[atokatazuke] tidying up
航跡[kouseki] wake (of boat)
痕跡[konseki] trace