Oh Boy, A Quiz With A Mystery Theme. Will You Take It Perhaps? by kanyewesteros

THIS SYNONYM FOR INEFFECTIVE comes from a Latin root referring to "pouring out easily" from a vessel, though you'd be forgiven for thinking that it came from a Unicomplex in outer space. (edited at 4:49 pm, May 16, 2017 (EDT))

Original question: THIS SYNONYM FOR INEFFECTIVE comes from a Latin root referring to "pouring out easily" from a vessel and not, though you'd be forgiven for thinking that it came from a Unicomplex in outer space.