Sentence:  After the Black Death many villeins, viewing enviously the high wages earned by those no longer bound to render <WSD>predial</WSD> services, began to think that the conditions in which they were placed were no longer generally fair. 
Meaning of the word marked with <WSD> tags:  Attached to the land (of slavery etc.); having to work on the land or an estate; deriving from the land.