Meaning

adjective capable of being supported by argument

adjective open to argument or debate

originEtymology tree Latin arguōder. Old French arguerbor. Middle English arguen English argue Proto-Indo-European *-tḗr Proto-Indo-European *-dʰlom Proto-Indo-European *-dʰlis Proto-Italic *-ðlis Latin -bilis Latin -ābilis Old French -ablebor. Middle English -able English -able English arguable From argue + -able.

Etymology from Wiktionary, CC BY-SA 3.0