WordWeb Online

1. Fully understood or grasped
   "these apprehended truths"
   - appreciated, comprehended

1. Get the meaning of something
   - grok [N. Amer], get the picture, comprehend, savvy, dig, grasp, compass
    
2. Take into custody
   "the police apprehended the suspected criminals"
   - collar, nail, arrest, pick up, nab, cop, nick [Brit]
    
3. Anticipate with dread or anxiety
   - quail at

See also: apprehender, apprehensible, apprehension, apprehensive, understood

Type of: anticipate, clutch, look for, look to, prehend [archaic], seize, understand