2508: Ōs & Os: Two Very Different Destinies Oct 24, 2021

Latin differentiates between long and short vowels for distinguishing words, such as 'os' (bone) and 'ōs' (mouth). The other forms of 'ōs', including the genitive 'oris' is where 'oral' or 'orifice' get the R. Conversely, English has many derivatives like 'ossify', 'ossific', 'ossiferous', none of which have R in the root, because there was none present in any Latin form. 'Ōs' has far fewer derivatives outside of these other forms—except the use of 'os' as a medical term in English—including in Romance languages, relatively speaking. Consider too than 'mouth' is 'boca' in Spanish and Portuguese, ​'bocca' in Italian, and 'bouche' in French, all of which come from Latin 'bucca' (cheek) itself likely from a Celtic origin, likely related to 'pouch' of Germanic origin, and possibly related to 'puke'.