This elliptic etymology relates βοῦς to the augmentative prefix βου- found in βούβρωστις "ravenous hunger", βουλιμία "idem", which can be translated βίαιος, as βουλιμία can be paraphrased as βίαιος λιμός "violent hunger". The etymon βου- is not given, only a semantic equivalent is. An explicit formulation would be Βοῦς· παρὰ τὸ βου-, ὅ ἐστι βίαιος, διὰ τὸ βίαιον τῆς δυνάμεως "Βοῦς comes from the prefix βου-, which means "strong", because of the power of its physical strength". The formulation is more explicit in Eustathius (see Parallels). This theory is partly correct from our modern point of view, since the augmentative prefix βου- was abstracted from compounds with "ox" as their first element, so that indeed βου- and βοῦς are related, but the real relationship is the opposite of the one assumed by Orion, namely, the augmentative prefix is derived from the name of the ox