steadfast
US /ˈsted.fæst/
UK /ˈsted.fæst/

1.
teguh, setia, mantap
resolutely or dutifully firm and unwavering
:
•
He remained steadfast in his loyalty to the company.
Dia tetap teguh dalam kesetiaannya kepada perusahaan.
•
Her steadfast determination helped her overcome many obstacles.
Tekadnya yang teguh membantunya mengatasi banyak rintangan.