FAIL

I. verb Etymology: Middle English ~en, from Anglo-French ~lir, from Vulgar Latin *fallire, alteration of Latin fallere to deceive, disappoint Date: 13th century intransitive verb 1. to lose strength ; weaken , to fade or die away , to stop functioning normally , 2. to fall short , to be or become absent or inadequate , to be unsuccessful , to become bankrupt or insolvent, transitive verb 1. to disappoint the expectations or trust of , to miss performing an expected service or function for , to be deficient in ; lack , to leave undone ; neglect , 4. to be unsuccessful in passing , to grade (as a student) as not passing, ~ingly adverb II. noun Date: 13th century ~ure , a ~ure (as by a security dealer) to deliver or receive securities within a prescribed period after purchase or sale