words opposites st isidore seville may well source lucus non lucendo paul werth suggests however accident benji wald attributed etymology varro 11627 b c e latter responsible etymological gems vallum quod ea varicare nemo posset _ vallum _ camp wall one could _ varicare _ traddle _ de lingua latina _ v 117 qua vix agi potest hinc angiportum qua nil potest agi hinc angulus hardly possible anything _ agi _ driven called _ angiportum _ alley nothing _ agi _ driven _ angulus _ corner ibid vi 41 footnote loeb edition _ de lingua latina _ refers derivation contrary meaning cites another example ludus quo minime luditur school little playing festus 122 16m karen baumer yale university