u can say appa for father, eomma for mother, chingu for friend and dongsaeng for yonger brother or sister. if u are a girl, u can say eonni for older sister, oppa for older brother. if u are a man u say noona for older sister and hyung for older brother.

Please check them out through online dictionaries instead of simply posting it here. Online References: http://en.wiktionary.org/wiki/Wiktionary:Main_Page http://wordreference.com/enko/ http://translate.google.com/ Good luck.