LENGTHENED
elongated, extended, lengthened, prolonged
(adjective) drawn out or made longer spatially; “Picasso’s elongated Don Quixote”; “lengthened skirts are fashionable this year”; “the extended airport runways can accommodate larger planes”; “a prolonged black line across the page”
Source: WordNet® 3.1
Verb
lengthened
simple past tense and past participle of lengthen
Source: Wiktionary
LENGTHEN
Length"en, v. t. [imp. & p. p. Lengthenel; p. pr. & vb. n.
Lengthening.]
Definition: To extent in length; to make longer in extent or duration; as,
to lengthen a line or a road; to lengthen life; -- sometimes followed
by out.
What if I please to lengthen out his date. Dryden.
Length"en, v. i.
Definition: To become longer. Locke.
Source: Webster’s Unabridged Dictionary 1913 Edition