Synonyms and related words :
absorbed, absorbed in, adamant, artless, assiduous, bigoted, bluff, blunt, born yesterday, bound, bound and determined, buried in, candid, caught up in, childlike, committed, confiding, constant, contemplating, contemplative, continuing, decided, decisive, dedicated, definite, determined, devoted, devoted to, diehard, diligent, direct, dogged, earnest, enduring, engaged, engrossed, engrossed in, faithful, frank, guileless, immersed in, immutable, inalterable, indefatigable, indomitable, industrious, inexorable, ingenu, ingenuous, innocent, insistent, intent, intent on, invincible, involved, lasting, lost in, loyal, meditating, meditative, monomaniacal, monopolized, naive, never-tiring, obdurate, obsessed, obstinate, occupied, open, openhearted, outspoken, patient, patient as Job, permanent, perseverant, persevering, persistent, persisting, pertinacious, plain, plodding, plugging, preoccupied, purposeful, rapt, relentless, resolute, resolved, rigid, sedulous, serious, simple, simplehearted, simpleminded, sincere, single, single-hearted, sleepless, slogging, stable, steadfast, steady, straightforward, stubborn, studious, studying, submerged in, swept up, taken up with, tenacious, tireless, totally absorbed, trustful, trusting, unabating, unbending, uncompromising, unconquerable, undaunted, undiscouraged, undissembled, undrooping, unfailing, unfaltering, unflagging, unflinching, unguarded, unintermitting, uninterrupted, unnodding, unrelaxing, unrelenting, unremitting, unreserved, unsleeping, unsophisticated, unsuspicious, unswerving, untiring, unvarnished, unwary, unwavering, unwearied, unwearying, unwinking, unyielding, utterly attentive, weariless, wholehearted, wrapped in, wrapped up in