Past tense of comprehend; understood fully or grasped the meaning of something.
From Latin 'comprehendere' (com- 'together' + prehendere 'to grasp/seize'). The verb entered English in the 13th century and literally meant 'to take hold of together.'
The root 'prehendere' meaning 'to grasp' is the same root in 'prehensile' (a monkey's grasping tail) and 'apprehend' (to seize/arrest)—so understanding literally means 'seizing together' in your mind!
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