Root words are the basic building blocks of language. They are the most basic form of a word and can be combined with prefixes and suffixes to create new words. ETYMA (5 letters) is a Greek term meaning 'true sense' and refers to the original, unaltered form of a word. RAHS (4 letters) is an acronym for 'root and stem, ' which refers to the two parts of a root word. ETYMONS (7 letters) is a Greek term meaning 'true name' and refers to the original form of a root word before it has been altered by prefixes or suffixes.