Os′ten‐ta″tious (?), a. Fond of, or evincing, ostentation; unduly conspicuous; pretentious; boastful.
Far from being ostentatious of the good you do. Dryden.
The ostentatious professions of many years. Macaulay.
— Os′ten‐ta″tious‐ly, adv. — Os′ten‐ta″tious‐ness, n.