Brush up on

Pro Tip 1/3

Frequency Matters

Repeatedly practicing a specific topic is implied when brushing up on it.

I'm brushing up on my Spanish verbs every evening.

Pro Tip 2/3

Not Starting Anew

The phrase suggests improving existing knowledge, not learning something completely new.

I'll brush up on my Italian before our trip, since I've spoken it before.

Pro Tip 3/3

Casual Tone

The phrase has a casual, informal feel and may not suit formal or academic writing.

Let's brush up on Shakespeare's plays over the weekend.