Definition of unmaster in English:

unmaster

verb

  • To make no longer master; to cause to lose mastery or control.

Pronunciation

unmaster

/(ˌ)ʌnˈmɑːstə/ /(ˌ)ʌnˈmastə/

Origin

Late 16th century; earliest use found in Joshua Sylvester (d. 1618), poet and translator. From un- + master.