get your tongue around
US /ɡɛt jʊər tʌŋ əˈraʊnd/
UK /ɡɛt jʊər tʌŋ əˈraʊnd/

1.
to be able to pronounce a difficult word or phrase
:
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I can't quite get my tongue around that German word.
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It took him a while to get his tongue around the new vocabulary.
2.
to understand or comprehend something difficult or complex
:
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It's hard to get your tongue around the concept of quantum physics.
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She struggled to get her tongue around the complex legal jargon.