latch on
    v 1: take hold of or attach to; "The biochip latches onto the
         genes"
    2: adopt; "take up new ideas" [syn: take up, latch on,
       fasten on, hook on, seize on]
    3: understand, usually after some initial difficulty; "She
       didn't know what her classmates were plotting but finally
       caught on" [syn: catch on, get wise, get onto,
       tumble, latch on, cotton on, twig, get it]