教师，讲师，导师
1. teacher, instructor, master
noun (common) (futsuumeishi)
sensei，对教师、导师、医生、律师等的尊称或称谓。
2. sensei, title or form of address for a teacher, master, doctor, lawyer, etc.
noun (common) (futsuumeishi)
noun, used as a suffix
honorific or respectful (sonkeigo) language
亲昵或调侃的称呼方式
3. intimate or teasing form of address
noun (common) (futsuumeishi)
jocular, humorous term
familiar language
长辈
4. one's elder
noun (common) (futsuumeishi)
archaic