Alternative forms woerum, boe-um (Maastrichtian) waorum (widespread variant) Etymology From boe + um. The -r- is a phonologically empty morpheme that exists to form a liaison. Pronunciation IPA(key): /ˈbu.ʀʏm/ Hyphenation: boer‧um Rhymes: -uʀʏm Adverb boerum (Maastrichtian) why Synonym: veurwat