Most stems are derived from roots by the addition of one or more formative suffixes.
|δῶ-ρο-ν||gift,||stem δωρο-,||root δω (δί-δω-μι ||suffix ρο-.|
|γραμ-ματ-εύ-ς||scribe,||stem γραμματευ-,||root γραφ,||suffixes ματ and ευ.|
a. Most words are therefore built up from root, suffix, and inflectional ending by a process of composition analogous to that seen in compounds ( cross869 ff.), in which the union of the various elements yields an idea different from that seen in each of the parts.
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].