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Synonyms for Untried (same or very similar meaning)

WordNet sense 1 (not yet proved or subjected to testing):

WordNet sense 2 (not of long duration; having just (or relatively recently) come into being or been made or acquired or discovered):

WordNet sense 3 (not tried or tested by experience):
unseasoned, young

WordNet sense 4 (lacking practical experience or training):

From the ODE community, based on WordNetadd/edit