1most grievously, in a burdensome, oppressive manner:
(
1266-1300;
MS: c.1300
)
pluisors nobles homes occirent et pluisors tres gresvousement forbannirent
152.R94.12
(
1365
)
car autrement le remanant de la commune serroit tresgrevousement chargez
ii 287
♦
very much, extensively, extremely:
(
1266-1300;
MS: c.1300
)
se elles soient froides
=animals used for meat, tres grevousement blechent ta nature
266.T66.50
tresgrevousement (1266-1300)