The regular word for teacher is ghojmoHwI'. A teacher held in high esteem, of higher rank than other teachers in the same institution, could be ghojmoHwI' quv or ghojmoHwI' Han (v. "be learned, scholarly, erudite"). Probably the highest standing of all is a 'a'ghen, which can be translated as "master teacher" or "professor". (qepHom 2016)