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

擬薬[giyaku] inactive placebo
擬い[magai] imitation
擬音[gion] imitative sounds (drama, broadcasting)
擬革[gikaku] imitation leather
擬革紙[gikakushi] imitation leather

擬古[giko] imitation of classical styles
擬古文[gikobun] classical style
擬死[gishi] feigning death
擬人[gijin] simulation of a person
擬人化[gijinka] personification