The Collaborative International Dictionary
Furthered
Further \Fur"ther"\, v. t. [imp. & p. p. Furthered; p. pr. & vb. n. Furthering.] [OE. furthren, forthren, AS. fyr[eth]ran, fyr[eth]rian. See Further, adv.] To help forward; to promote; to advance; to forward; to help or assist.
This binds thee, then, to further my design.
--Dryden.
I should nothing further the weal public.
--Robynsom
(More's
Utopia).
Wiktionary
furthered
vb. (en-past of: further)