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self-mastered
self-mastered adj. 
/ˌsɛlfˈmastəd/,
Brit. /ˌsɛlfˈmɑːstəd/
, /ˌsɛlfˈmɑːstəd//ˌsɛlfˈmastəd/U.S. /ˌsɛlfˈmæstərd/
/ˌsɛlfˈmæstərd/ΚΠ
1849 M. Arnold Strayed Reveller, & Other Poems 3 When the dup'd soul, self-master'd, claims its meed.
1926 PMLA 41 561 This concept of Temperance as self-mastered calm encircled..by a thousand beleaguering passions.
2005 M. K. Asante & A. Mazama Encycl. Black Stud. 315/2 The truly self-mastered person who..is in harmony..and whose life is in order.
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