Undeveloped

Adjective

 * 1) not developed or used
 * 2) lagging behind others, especially in economic or social matters

Thesaurus
a novice at, a stranger to, adulterated, archaic, arrested, backward, behindhand, blemished, budding, callow, coarse, crude, damaged, defective, deficient, dewy, embryonic, erroneous, ever-new, evergreen, failing, fallible, faulty, firsthand, fledgling, found wanting, fresh, green, green as grass, growing, hypoplastic, ignorant, immature, impaired, imperfect, imprecise, impubic, impure, in arrear, in arrears, in default, in embryo, in ovo, in short supply, in the rough, inaccurate, inadequate, inchoate, incipient, incomplete, inexact, inexperienced, infant, ingenuous, innocent, intact, juicy, lacking, latent, maiden, maidenly, makeshift, mediocre, minor, missing, mixed, naive, needing, neoteric, nestling, new, new to, new-fledged, not perfect, off, original, oversimple, part, partial, patchy, persistent, potential, premature, pristine, raw, reductionistic, reductive, ripening, rough, roughcast, roughhewn, rude, rudimental, rudimentary, sappy, scant, scanty, scrappy, sempervirent, short, shy, simplistic, sketchy, stunted, tender, unaccustomed to, unacquainted with, unadult, unbeaten, unblown, unconversant, unconversant with, uncultivated, uncultured, uncut, underage, underdeveloped, uneven, unexperienced, unfamiliar with, unfashioned, unfinished, unfledged, unformed, unhandled, unhewn, uninitiated in, unlabored, unlicked, unmatured, unmellowed, unperfected, unpolished, unpracticed, unpracticed in, unprocessed, unprogressive, unrefined, unripe, unseasoned, unskilled in, unsound, unthorough, untouched, untreated, untried, untrodden, unused, unused to, unversed, unversed in, unworked, unwrought, vernal, virgin, virginal, wanting, young

Translations

 * Finnish: