1. (

• twig

) branch out in a twiglike manner; "The lightning bolt twigged in several directions" ;

2. (

• 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" ;