Sentence:  Schoolchildren around the globe have gleefully sung Torches at Christmastime for half a century. Many of those in Birmingham have <WSD>wassailed</WSD> the carol at the front door of a cosy Victorian house in Moseley, unaware that behind that front door lives its composer. 
Meaning of the word marked with <WSD> tags:  To go from house to house at Christmastime, singing carols.