adj.steadfast in devotion (especially to your lawful monarch or government)

"it is impossible to be allegiant to two opposing forces"

1. The allegiant soldiers vowed to protect their country at all costs.
   忠誠的士兵發(fā)誓不惜一切保護他們的國家。
2. As an allegiant citizen, she actively participates in community service.
   作為一個忠誠的公民，她積極參與社區(qū)服務。