Unformed

Adjective

 * 1) not having a definite form
 * 2) not well developed
 * 3) not formed or made

Thesaurus
amorphous, arrested, backward, budding, callow, coarse, crude, dewy, embryonic, green, growing, immature, impubic, in embryo, in ovo, in the rough, inchoate, inexperienced, ingenuous, innocent, intact, juicy, minor, naive, new-fledged, oversimple, raw, reductionistic, reductive, ripening, rough, roughcast, roughhewn, rude, rudimental, rudimentary, sappy, shapeless, simplistic, stunted, tender, unadult, unblown, uncultivated, uncultured, uncut, underage, underdeveloped, undeveloped, undressed, unfashioned, unfinished, unfledged, unhewn, unlabored, unlicked, unmellowed, unpolished, unprocessed, unrefined, unripe, unseasoned, unshaped, unshapen, untreated, unworked, unwrought, vernal, virginal

Etymology
From un- + formed