既婚 is read as きこん (kikon) and means married.
きこん
kikon
きこんじょせい
married woman
きこんだんせい
married man
きこんしゃ
married person
きせい
established
きそん
existing
すでに
already
すんでに
almost
ready-made
きせいふく
ready-made clothes
きてい
きせいじじつ
established fact
きとくけん
vested rights