gaber

to ridicule; mock; to speak clumsily; to blunder; to laugh

From Middle French, from Old French gaber (“to tell jokes”), from Old Norse gabba (“to mock”), from Proto-Germanic *gabbōną (“to mock, jest”), from Proto-Indo-European *ghabh- (“to be split, be forked, gape”). Cognate with Old English gabban (“to scoff, mock, delude, jest”), Old Frisian gabbia (“to accuse”), Middle Dutch gabben (“to mock”), Middle Low German gabben (“to have fun, jest”). More at gab.