undeveloped (adj.)

• adulterated
• archaic
• backward
• behindhand
• blemished
• budding
• callow
• coarse
• crude
• damaged
• defective
• deficient
• dewy
• embryonic
• erroneous
• evergreen
• failing
• fallible
• faulty
• firsthand
• fledgling
• fresh
• green
• growing
• ignorant
• immature
• impaired
• imperfect
• imprecise
• impure
• inaccurate
• inadequate
• inchoate
• incipient
• incomplete
• inexact
• inexperienced
• ingenuous
• innocent
• intact
• juicy
• lacking
• latent
• maiden
• maidenly
• makeshift
• mediocre
• minor
• missing
• mixed
• naive
• new
• off
• original
• part
• partial
• patchy
• persistent
• potential
• premature
• pristine
• raw
• reductive
• ripening
• rough
• roughhewn
• rude
• rudimentary
• sappy
• scant
• scanty
• scrappy
• short
• shy
• simplistic
• sketchy
• stunted
• tender
• unbeaten
• uncultivated
• uncultured
• uncut
• underage
• underdeveloped
• uneven
• unfinished
• unfledged
• unformed
• unhewn
• unpolished
• unpracticed
• unprocessed
• unprogressive
• unrefined
• unripe
• unseasoned
• unsound
• untouched
• untreated
• untried
• untrodden
• unused
• unversed
• vernal
• virgin
• virginal
• wanting
• young