assertedly
as·sert·ed
(ə-sûr′tĭd)adj.
Confidently stated to be so but without proof; alleged: the asserted value of a painting.
as·sert′ed·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
assertedly
(əˈsɜːtɪdlɪ)adv
in a maintained but uncorroborated manner
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014