to succeed in understanding something difficult or strange.

I still can't get my mind around the cruel things she said last night.

Related vocabulary: get your arms around something

• be on its last legs
• be on last legs
• be only a matter of time
• be on mettle
• be on pins and needles
• be on record
• be on red alert
• be on shit list
• be on someone's ass
• be on someone's back
• be on someone's case
• be on someone's shit list
• be on song
• be on speaking terms
• be on tail
• be on the back burner
• be on the ball
• be on the blink
• be on the bottle
• be on the breadline
• be on the brink of
• be on the brink of doing something
• be on the cards
• be on the case
• be on the crest of a wave