The headword, the metrically uncontracted version of dhria=sqon, is the third person dual of the verb dhria/omai, derived from dh=ris (delta 489, delta 490). Quoted here from Homer, Iliad 12.421, where it appears in a simile about two disputatious neighbors (web address 1). See also Apollonius Rhodius, Argonautica 2.89 (two wrangling bulls).