What is appreciate?

(verb): Increase the value of.
Example: "The Germans want to appreciate the Deutsche Mark"
Synonyms: apprize, apprise
See also — Additional definitions below

More definitions of "appreciate":

(verb): Gain in value.
Synonyms: apprize, apprise, revalue

(verb): Be fully aware of; realize fully.
Example: "Do you appreciate the full meaning of this letter?"
Synonyms: take account

(verb): Hold dear.
Synonyms: prize, value, treasure

(verb): Recognize with gratitude; be grateful for.