Espontâneo.
a.Not studied; not acquired by study; unlabored; natural.
Not skilled; unversed; -- followed by in.
Not spent in study
uncontrived, candid similar term, unaffected related term, studied antonym adj, uneducated similar term
Vogais: uuie
Consoantes: nstdd
unsated, unsized, unsatiated, unguided, unshaded, unstated, unsuited, unsatiate, unscathed, unshed.