Sigung = Grandmaster/teacher's teacher
Sifu = Master/teacher
Sibaak = Senior Uncle
Siguma = Senior Aunt
Sisuk = Junior Uncle
Siguje = Junior Aunt
Sihing = Senior Brother
Sijeh = Senior Sister
Simui = Junior Sister
Sidai = Junior Brother
Toudai = Student/indoor student
Tousyunneui = Female Grandstudent
Tousyun = Male Grandstudent

These are the ones I know of, plus the two at the bottom are from a reference I found on the web.