Lewis Short
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.
Charlton T. Lewis, Charles Short, A Latin Dictionary