1. (a.) Faithful to law; upholding the lawful authority; faithful and true to the lawful government; faithful to the prince or sovereign to whom one is subject; unswerving in allegiance.

2. (a.) True to any person or persons to whom one owes fidelity, especially as a wife to her husband, lovers to each other, and friend to friend; constant; faithful to a cause or a principle.

abandoned acquiescent active afire ardent assiduous burning committed compliant complying conforming conscientious consistent constant continuing dedicated dependable devoted devout diligent dogged duteous dutiful earnest enduring faithful fervent fervid fiery firm fixed flaming flinty hearty heated hot hot-blooded immovable immutable impassioned in earnest inalterable indefatigable indomitable industrious inflexible insistent intense intent intent on invincible lasting law-abiding liege marble-constant meticulous mindful never-tiring obedient observant obstinate on fire passionate patient patient as Job patriotic perfervid permanent perseverant persevering persistent persisting pertinacious plodding plugging practicing preoccupied punctilious punctual rapt red-hot regardful relentless reliable resolute scrupulous sedulous serious set settled sincere single-minded sleepless slogging sot spirited stable staunch steadfast steady steely stubborn submissive tenacious tireless TRUE true-blue trusted trustworthy trusty unabating unbending unconquerable undaunted undeflectable undiscouraged undrooping unfailing unfaltering unflagging unflappable unflinching unintermitting uninterrupted unnodding unrelaxing unrelenting unremitting unshaken unsleeping unswerving untiring unwavering unwearied unwearying unwinking unyielding utterly attentive vehement warm weariless white-hot willing zealous