very numerous, superfluous (Carswell's imarcach), Irish iomarcach, Middle Irish imarcraid, superfluity (also "carrying", from immarchor, cor, place, as in iomarchur). M`A. gives the meaning as "in many distresses, distressed", and the root as arc of airc.
Etymological dictionary of the Gaelic language.
Alexander Gairm Publications.
1982.