Paragogic

In the Semitic languages, paragogic letters are added to the ordinary forms of words to express additional emphasis or a change in the meaning.

The loss of final -n is irregular. We would rather expect *teón to develop into **θòno, with a paragogic vowel as in (Log.) sámbene' ‘blood’ < sanguen, nòmene ‘name’ < nōmen and báttoro ‘four’ < quatt(u)or.