To hollow out, undermine, wash away, said especially of water. Ginkubkubán ang bató sang túbig. The stone was undermined by the water. Ginkúbkub sang túbig ang balás. The water washed away the sand. (see áb-ab, kábkab, kádkad).
kúbkub
Hiligaynon
To bow down, incline, bend over, stoop, dip. (see kuúb).