An Etymological Dictionary of the German Language/Annotated/prassen
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prassen, verb, ‘to riot, carouse,’ Modern High German only, from Dutch brassen, ‘to gormandise’ (akin to bras, ‘feast’). Old Icelandic brass, ‘cook,’ and brasa, ‘glowing coal’ (compare Old French brese, Provençal brasa), may be connected with it.