What are other idioms or expressions for the phrase "I can't wrap my head around"?.
"But what I still can't wrap my head around is why she behaved like that"
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The oldest of these expressions appears to be to “get one’s head around” something, a usage that the Oxford English Dictionary has been tracking since the 1920s.
The OED defines the expression and its variants as “to master or fully comprehend (a subject or fact), esp. despite initial difficulty or reluctance” or “to come to terms with (a situation).”
(informal) to be able to understand something (usually negative):
- He's tried to explain the rules of the game dozens of times but I just can't get my head around them.
(Cambridge Idioms Dictionary)