Ajahn
Ajahn (Thai: อาจารย์, RTGS: achan, IPA: [ʔāː.tɕāːn]; Lao: ອາຈານ, romanized: ācān) is a Thai- and Lao-derived term that translates as "professor" or "teacher". The term is in turn derived from the Pali word ācariya and is a term of respect, similar in meaning to the Japanese sensei.