For example the adjectival suffix -each was interpreted as the noun each (an old word for ‘horse’), resulting a large number of unusual horsey compounds.
(from Elaine U? Dhonnchadha’s PhD thesis,?http://doras.dcu.ie/2349/)
Each is the normal Scottish Gaelic word for horse; Irish prefers?capall, which in Scotland means “mare”, but has been borrowed into English. Capercaillie comes from?capall-coille, or “mare of the woods”.