sarrio.

Uncertain. De Vaan expressed uncertainty on whether the geminate consonant form sarriō or the long vowel form sārio was the more original form. (Note, however, that Gaffiot lists the form with one r as having short ă.) He assigns this word to Proto-Indo-European *sers- (“to cut off, weed”), connecting it with serra (“saw”) and Proto-Iranian *hrnaka- (“saw”) (whence Sanskrit सृणी (sṛṇī, “sickle”), Khotanese [script needed] (harraa-, “saw”)), while contemplating on whether it could be derived from a root *ser- (“to cut off”). The LIV alternatively derives sariō from *sr̥h₃-yé-ti, from *serh₃-, in which case the Latin term would perhaps relate to Ancient Greek ῥώομαι (rhṓomai, “to move violently, with speed”), though this connection is semantically tentative and is rejected by De Vaan.