The word is a hapax in Anglo-Norman, without equivalent in the cognate dictionaries.
s.
1power, physical strength:
(
c.1270; MS: s.xivin
)
le visage devint tut blef; Pur defaute de pouaille Tut aval pendi sun chief. Alasse, cele duce teste Qe porter soleie en mes bras, Ore pent sanz chescun aide, Qe li col ly est mult las
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