[bone up] vi (1887) 1: to try to master necessary information quickly: cram "bone up for the exam"
2: to renew one's skill or refresh one's memory "boned up on the speech just before giving it"
[bone up] vi (1887) 1: to try to master necessary information quickly: cram "bone up for the exam"
2: to renew one's skill or refresh one's memory "boned up on the speech just before giving it"
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012