to understand (something) fully

understand

to see (something) clearly (with the eyes or with the mind)

catch sight of; recognize and understand

to be fully conscious of, understand, (something); to exchange (property, business shares etc) for money

appreciate, become aware of

to know the meaning, nature, explanation, of (something); to learn (something) from a conversation, remark etc; to accept a word, statement, as meaning (something)

appreciate, comprehend

to imagine (something) as a picture

make a picture of in the mind