Under-smúgan

According to the Old English Dictionary:

under-smúgan

p. -smeáh, pl. -smugon; pp. -smogen To creep under, come upon unawares, surprise :-- Ídelnysse underþeódde gálscype undersmýhð otio deditos luxuria subripit, Scint. 89, 8. Ne undersmúge gítsunge yfel non subripiat (but other MS. subrepat) avaritie malum, R. Ben. Interl. 95, 7. Ðæt ǽnig þinc ne undersmuge on wege gesyhðe ne quid forte subripuerit in via visus, 113, 11. Swá hý nǽfre mid oferfylle undersmogene and beswicene ne weorðan ne subrepat satietas aut ebrietas, R. Ben. 64, 19. under-smugan