Sentence:  ... But for he had hir sought, / And coulde not finde hir any where, assuredly he thought / She did not liue aboue the molde, ne drewe the vitall breath: / <WSD>Misgiuing</WSD> worser in his minde, if ought be worse than death. 
Meaning of the word marked with <WSD> tags:  To suspect; to dread.