word own opposite st isidore seville source lucus non lucendo paul werth suggest however s accident benjus wald attribute etymology varro b c e latter responsible etymological gem vallum quod ea varicare nemo posset vallum camp wall one varicare s traddle over de lingua latina v qua vix agus potest hinc angiportum qua nil potest agus hinc angulus where hardly possible anything agus drive call angiportum alley where nothing agus drive angulus corner ibid vi footnote loeb edition de lingua latina refer derivation contrary mean cite another example ludus quo minime luditur school little play festus m karen baumer yale university 