Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dē-lasso, āvi, ātum, 1, v. a., to weary or tire out (rare and poet. for defetigare): labore delassatus, Plaut. Asin. 5, 2, 22: loquacem Fabium, Hor. S. 1, 1, 14.
Poet., with a thing as obj.: delasset omnes fabulas poetarum, Mart. 10, 5 fin.
dē-lăvo, no perf., -lōtum, āre, v. a., to wash off, wash clean: porcellum liquamine, Apic. 8. 7; Theod. Prisc. 1, 4.