IsNin9 110:7 :ܘܥܲܠ ܗܵܠܹܝܢ ܕܥܵܪܨܘ݂ܬ݂ܵܐ‏ : concerning those accidental (sins)
See the entire entry for ˁarṣū, ˁarṣūṯā n.f. sudden happening, accident