comprehend

To understand or grasp fully and thoroughly; to plumb.

I just can't comprehend how someone could be a butcher and vegetarian at the same time.

Our ſoules, whoſe faculties can comprehend The wondrous Architecture of the world: And meaſure euery wandring planets courſe, Still climing after knowledge infinite, […]

To include, comprise; to contain.

And lothly mouth, unmeete a mouth to bee, / That nought but gall and venim comprehended […].

The King being resolved to have a Peace concluded at any Rate, sent us at last to Monsieur des Farges, who would hearken to no Treaty, without allowing us the benefit of being comprehended in it, by which means our liberty was obtain'd.