earnest or emphatic in dwelling upon, maintaining, or demanding something; persistent; pertinacious.

compelling attention or notice

an insistent tone.

adjective

disinterested , indifferent , lenient , tolerant

adjective

assertive , burning , clamant , clamorous , continuous , crying , dire , dogged , emphatic , exigent , forceful , imperative , imperious , importunate , incessant , obstinate , peremptory , perseverant , persevering , persistent , pressing , reiterative , resolute , resounding , unrelenting , urgent , importune , conspicuous , firm , insisting , prominent , pushy , strident , unyielding