mânni verb of state – is not; stem: mânn-
mânnùbur negated verb of state – is not; stem: mânn-, negating suffix –ùbur (-ù-bur)
http://www2.hf.uio.no/common/apps/permlink/permlink.php?app=polyglotta&context=record&uid=854499b9-0103-11e7-9707-0050569f23b2