περιπτωτικός
From LSJ
βορβόρῳ δ' ὕδωρ λαμπρὸν μιαίνων οὔποθ' εὑρήσεις ποτόν → once limpid waters are stained with mud, you'll never find a drink
English (LSJ)
ή, όν,
A falling into that which one seeks to avoid, Epicureiap. Plu.2.420d, Arr.Epict.3.6.6, etc.; τῷ κακῷ M.Ant. 10.7. Adv. -κῶς Arr.Epict.4.10.6. II accidental, π. εἶδος ἐμπειρίας Gal.Sect. Intr.2. Adv. -κῶς S.E.M.1.25.