既に【すでに】
already, too late
既成【きせい】
established, existing, accomplished, accepted, completed
既婚【きこん】
married
既成事実【きせいじじつ】
established fact, fait accompli
既製服【きせいふく】
ready-made clothes
既製【きせい】
ready-made, off the shelf
既往症【きおうしょう】
illness that one had in the past, previous illness, medical history, anamnesis