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comprehend [comprehended, comprehending, comprehends]▼(to understand)
verb
[UK: ˌkɒm.prɪ.ˈhend] [US: ˌkɑːm.pri.ˈhend]

fathom [fathomed, fathoming, fathoms]▼(to deeply understand (someone or something))
verb
[UK: ˈfæ.ðəm] [US: ˈfæ.ðəm]

acquire [acquired, acquiring, acquires]▼(to gain, usually by one's own exertions; to get as one's own)
verb
[UK: ə.ˈkwaɪə(r)] [US: ə.ˈkwaɪər]

figure out▼(come to understand)
verb
[UK: ˈfɪ.ɡə(r) ˈaʊt] [US: ˈfɪ.ɡjər ˈaʊt]

recognize [recognized, recognizing, recognizes]▼(to realize or discover the nature of something)
verb
[UK: ˈrek.əɡ.naɪz] [US: ˈrek.əg.ˌnaɪz]