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Definition of insistent : 1. Insisting; persistent; persevering.
2. See Incumbent.
3. Standing or resting on something; as, an insistent wall.

Synonyms:

piercing, continual, glaring, can't hear yourself think, driven, motivated, continuous, gross, patient, riotous, reiterative, importune, crying, inst, loud, urgent, instantaneous, shrill, forceful, deafening, exigent, continue, flagrant, resounding, rank, pertinacious, vociferous, noisy, emphatic, exacting, ambitious, ear-splitting, importunate, sedulous, purposeful, imperative, repetitive, instant, blatant, clamant, clamorous, repetitious, competitive, uproarious, egregious, strident

affirmative (part of speech: adjective)

certain, affirmative, positive, declarative, definite, predicative, assertive, categorical, sure

tenacious (part of speech: adjective)

bulldogged, undaunted, flintlike, stiff, hard, obdurate, unflagging, stony, obstinate, strong, brave, enduring, fervent

resolute (part of speech: adjective)

implacable, unwavering, valiant, decided, indomitable, steady, dauntless, decisive, unflinching, stubborn, willing, resolved, dogged, thorough, ruthless, hearty, steadfast, unchangeable, loyal, constant, true, relentless, intent, unyielding, unshakeable, bold, devoted, persevering, stern, strong-minded, reliable, diligent, steely, indefatigable, courageous, plucky, determined, tenacious, committed, tough, bullheaded, serious, uncompromising, staunch, resolute, faithful, firm, deliberate, zealous, set, unbending, tireless, headstrong, earnest, iron-willed, inexorable, dedicated, strong-willed, spunky, persistent, fearless

Usage examples: