Decadeslong

Origin

decades + long

Full definition of decadeslong

Adjective

1. Lasting for decades.
• 2007, July 13, Kyle Whitmire, Suit in U.S. Over Murders in Colombia, From the start of its operations in Colombia, the company was on guard against the decadeslong civil strife in the country between left-wing guerrilla and right-wing paramilitary groups, witnesses have testified.