verb

past tense: twigged; 

understand or realize something.

synonyms: realize, understand, grasp, comprehend, take in, fathom, apprehend, perceive, see, recognize; Moresee the light; informallatch onto, cotton onto, catch onto, tumble to, get, get wise to, get one’s head around, wrap one’s mind around, figure out, get a fix on, get the message, get the picture, have an aha moment;

perceive; observe.