brush up
• improve one's existing knowledge or skill in a particular area.
• "these private lessons will give them a chance to brush up on their technique"
Similar:
revise,
read up,
go over,
refresh one's memory of,
relearn,
cram,
study,
learn,
improve,
sharpen (up),
polish up,
better,
enhance,
hone,
refine,
fine-tune,
perfect,
rub up,
bone up,
swot up on,
gen up on,
brush-up
noun
• an act of cleaning or smartening oneself or something up.
• "he must want a wash and brush-up after the long journey"
