Lewis Short
(verb) : pīgrĕo, ēre, id.
* To be slow, sluggish, reluctant (ante-class.): post aetate pigret sufferre laborem, Enn. ap. Non. 219, 12 (Ann. v. 405 Vahl.): omnes gaudent facere recte, male pigrent, Att. ap. Non. 14.
Charlton T. Lewis, Charles Short, A Latin Dictionary