The Language of the Scottish Traveller: A Dictionary

louse, lowse verb to loosen: ...and hame they go and she louses the wee donkey and goes into the hoose. la14-.
‣ lousin the action of cutting twine which bound sheaves before feeding into a threshing mill 20-: Compare lowsing time etymology: Scots lowse ‘to loosen; untie’; attested by BS in TDITA and BW