One of the mysteries of the English language finally explained.
English regional (Lincolnshire). Of an action, task, etc.: flowing smoothly; easily performed.
Middle English (in an earlier sense). From Anglo-Norman renable, reinable, reignable, reinnable, Anglo-Norman and Old French rainable, reidnable, rednable, variants of resnable, raisnable, etc. reasonable. The tendency for semantic narrowing in later use probably results from folk-etymological association with ren, variant of run.
In this article we explore how to impress employers with a spot-on CV.