Loyal1. (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.
Thesaurus Entries
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