Sentence:  At Chrystes death, whan the Apostles all / Theyr mayster dyd leaue, throughe mutabylytie / Men were founde lyght, and <WSD>trundlynge</WSD> as a ball / In them was no fayth, but infydelytye 
Meaning of the word marked with <WSD> tags:  To roll or revolve; to roll along.