Synonyms for Unseasoned (same or very similar meaning)
WordNet sense 1 (without salt or seasoning):
unsaltedWordNet sense 2 (lacking flavor):
tastelessWordNet sense 3 (not tried or tested by experience):
untested, untried, youngWordNet sense 4 (lacking practical experience or training):
inexperienced, inexperientFrom the ODE community, based on WordNetadd/edit