úthlaup (noun n.) ‘plundering expedition...’

• Sigv ErfÓl 4^I/2 — úthlaupum ‘plundering expeditions’ 1040
• SnH Lv 1^II/6 — úthlaupi ‘to furtive raids’ 1054

elements in compounds

• Bkrepp Magndr 2^II — úthlaupsferðum ‘the rebels ’ 1100