insistent Synonyms

clamant exigent repetitive crying instant single-minded steadfast stiff stubborn tenacious tireless set rigid pressing purposeful purposive quenchless reiterative relentless resolute resolved unbending uncompromising undaunted unbendable unchallengeable rock-ribbed hanging tough pushy unswerving can-do unwavering dead set set on unyielding vociferous urgent unswayable unshakable unremitting unrelenting unsatisfiable pig-headed immovable high-pressure frequentative forceful fixed firm emphatic