一遇[ichiguu] one meeting
遇う[au] to meet
奇遇[kiguu] unexpected meeting
境遇[kyouguu] environment
遇する[guusuru] to entertain

厚遇[kouguu] cordial welcome
最恵国待遇[saikeikokutaiguu] most favored nation
処遇[shoguu] treatment
千載一遇[senzaiichiguu] once in a lifetime (opportunity)
遭遇[souguu] encounter