1. (verb) adopt

• fasten on
• hook on
• seize on
• take up

2. (verb) understand, usually after some initial difficulty

• catch on
• cotton on
• get it
• get onto
• get wise
• tumble
• twig

1. (verb) take hold of or attach to

• grasp
• hold on

2. (verb) adopt

• adopt
• embrace
• espouse
• sweep up

3. (verb) understand, usually after some initial difficulty

• apprehend
• compass
• comprehend
• dig
• get the picture
• grasp
• grok
• savvy