This rare adjective appears only twice in Paul's letters, both times in Romans. It describes a moral condition where someone has no legitimate excuse or defense for their actions. In Romans 1:20, Paul argues that creation itself reveals God's nature so clearly that those who reject Him stand without excuse. In Romans 2:1, he turns this against the moralist who judges others while doing similar things. The multilingual evidence (Spanish sin-excusa, French sans-excuse, German ohne-Entschuldigung) consistently captures this legal-moral sense of being indefensible.