unstudied
[adjective]
Synonyms: natural, artless, ingenuous, naive, simple, unaffected, unartificial, unschooled, unsophisticated, untutored, extemporaneous, autoschediastic, extemporary, extempore, impromptu, improvised, offhand, spur-of-the-moment, unrehearsed

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Antonyms: studied

[TahlilGaran] English Synonym Dictionary ▲

un·stud·ied (n-stdēd)
adj.
► Not contrived for effect; natural:
unstudied grace.
► Not gained by study or instruction:
unstudied talent.

[TahlilGaran] American Dictionary ▲