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self-mastering
self-mastering adj. 
/ˌsɛlfˈmast(ə)rɪŋ/,
Brit. /ˌsɛlfˈmɑːst(ə)rɪŋ/
, /ˌsɛlfˈmɑːst(ə)rɪŋ//ˌsɛlfˈmast(ə)rɪŋ/U.S. /ˌsɛlfˈmæst(ə)rɪŋ/
/ˌsɛlfˈmæst(ə)rɪŋ/ΚΠ
1846 Monthly Relig. Mag. Nov. 485 There have been self-denying and self-mastering apostles, when mankind needed a ministry of love.
1930 Rotarian Jan. 50/3 None but a high-souled and self-mastering people could have planned or built the Parthenon.
1998 Weekly Standard (Nexis) 24 Aug. 38 Citizens who..will labor always to sustain their determination to be virtuous, self-mastering,..and educated liberally.
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