Strong's G1988 — ἐπιστάτης (noun)
epistates (ep-is-tat'-ace) n.
1. an appointee over, i.e. commander (teacher)
[from G1909 and a presumed derivative of G2476]
KJV: master 
Root(s): G1909, G2476 
Hebrew root: ἵστημι
Occurrences: 7