Why is the ninth month called September?
"belching," 1530s, from Latin eructationem (nominative eructatio) "a belching forth," noun of action from past participle stem of eructare "to belch forth, vomit," from ex- "out" (see ex-) + ructare "to belch," from PIE *reug- "to belch" (cf. Lithuanian rugiu "to belch," Greek eryge, Armenian orcam), probably of imitative origin. Related: Eruct; eructate.
eructation e·ruc·ta·tion (ĭ-rŭk-tā'shən, ē'rŭk-)
The act or an instance of belching.