adjective
1.
continuing in a course of action without regard to discouragement, opposition, or previous failure
a persistent suitor
Synonyms: dogged, insistent, perseverant, perseverative, persevering, persisting, persistive
Related Word: determined, steadfast, tenacious, unshakable; relentless, unremitting
Contrasted words: malleable, pliant, tractable, yielding; infirm, invertebrate, spineless; vacillating, wavery, wobbling
2.
Synonyms: primitive 3, archaic, undeveloped, unevolved