Verb catch on has 2 senses
- catch on, get wise, get onto, tumble, latch on, cotton on, twig, get it - understand, usually after some initial difficulty; "She didn't know what her classmates were plotting but finally caught on"
--1 is one way to get the picture, comprehend, savvy, dig, grasp, compass, apprehend
Sample sentences:
Somebody ----s
Somebody ----s PP
- catch on - become popular; "This fashion caught on in paris"
--2 is one way to change
Sample sentences:
Something ----s
Something is ----ing PP
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