KOU 
maji(waru), maji(eru), ma(jiru), ma(zaru), ma(zeru), ka(wasu) 
() intersect () intercourse () exchange
kousaten () road intersection
gaikou () foreign relations
mikawasu () exchange glances

Links: KanjiDic: EDict : Wikimedia
Etymologies: 中文字譜 : 説文解字