1. A method implemented by an information handling system that includes a memory and a processor, the method comprising: analyzing a plurality of words included in a plurality of electronic documents, wherein the analysis identifies at least one of the plurality of words as being a portmanteau that is not currently stored in a dictionary utilized by a question answering (QA) system; identifying a plurality of morphemes included in the identified portmanteau and one or more candidate words that correspond to each of the identified morphemes, wherein each of the candidate words has a candidate word definition; deriving a definition for the identified portmanteau, wherein the deriving comprises creating the definition by combining at least two of the candidate word definitions; and storing the identified portmanteau and the derived portmanteau definition in the dictionary utilized by the QA system, wherein the QA system utilizes the derived portmanteau definition to understand and answer one or more questions corresponding to the identified portmanteau.