sen·sei 
(sĕnsā′, sĕn-sā)
(sĕnsā′, sĕn-sā)n. pl. sen·seis
1. A teacher or mentor, especially of a martial art.
2. Used as a form of address for such a person.
[Japanese, teacher, master, from Middle Chinese sianʂaːjŋ, elder, prior-born (term of respect) (also the source of Mandarin xiānsheng) : sian, first + ʂaːjŋ, to give birth, be born (ultimately from Proto-Sino-Tibetan *sriŋ, live, life; also the source of Burmese hrang, live, alive).]