Definition of get one's head round (or around) in English:

get one's head round (or around)

phrase

British
informal
  • usually with negative Understand or come to terms with.

    ‘I just can't get my head around this idea’
    • ‘Even Machiavelli would have trouble getting his head round that one.’
    • ‘I didn't start at the beginning - I know I'm still having trouble getting my head around that, so I skipped to chapter three and read it through - 18,000 words - before dinner.’
    • ‘Doubtless it takes time to get your head around the understated complexities of Japanese food.’
    • ‘We encourage you to read this article because it might help you get your head round what we've just said.’
    • ‘Obviously you're only going to be able to get your head around this stuff in terms of Jungian pop psychology, because that sounds like an intellectually plausible frame of reference, and its the only one you have for it.’
    • ‘Equally as daunting is the local slimming class in a draughty scout hut, with public weigh-ins and complex eating plans you haven't time to get your head around.’
    • ‘It's not easy stuff to get your head round, but it is clearly vital.’
    • ‘When I've got my head around how it's going, I'll write something about how it's working, too.’
    • ‘It is not all practical; the coursework is very hard to get your head around.’
    • ‘To go to another team and sit on the bench, it would be disappointing to finish my career that way… it's difficult to get your head around that.’
    comprehend, apprehend, grasp, see, take in, perceive, discern, make out, puzzle out, recognize, keep up with, master, get to know, follow, fathom, get to the bottom of, penetrate, divine, interpret, unravel, decipher, see the light about, envisage
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