unoriginal
un-o-ri-gi-nal
adjective
Lacking newness or freshness; not innovative or imaginative.
"Her essay contained some unoriginal ideas."
Thesaurus
Synonyms: well-worn, slavish, threadbare, trite, old-hat, stale, cold, timeworn, bromidic, hackneyed, moth-eaten, corny
Antonyms: original