Etymology
From Middle English bysen, partly from Old English bȳsen (“example, pattern, model, similitude, parable, parallel, rule, command, precept”), and partly from Old Norse býsn (“a wonder, a portentous thing”), both from Proto-Germanic *būsniz (“command, precept”), from Proto-Germanic *beudaną (“to ask, beg”), from Proto-Indo-European *bʰewdʰ- (“to be awake, perceive fully”).