Root word is a term used to describe the basic form of a word, which can be modified by adding prefixes and suffixes. The three crossword solutions for the term root word are RAH (3 letters), ETYMON (6 letters), and OLE (3 letters). RAH is an acronym for the Latin phrase 'radix hujus, ' which translates to 'root of this.' ETYMON is derived from the Greek word 'etumon, ' which means 'true sense' or 'true origin.' OLE is an acronym for the Latin phrase 'origo lexicalis, ' which translates to 'lexical origin.'