ETYM Colloq. U. S.
1. To make a deep hollow sound; SYN. boom out.
2. To make a resonant sound; as of artillery; SYN. din.
3. To grow stronger; SYN. prosper, thrive, get ahead, flourish, expand.
1. To put something somewhere so that the space is completely filled.
2. To study intensively, as before an exam; SYN. grind away, drum, bone up, swot, get up, mug up, swot up, bone.