Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
prefix with various senses, from Old English up (adv.), corresponding to similar prefixes in other Germanic languages.
pre. 1 (non-gloss definition: Used to indicate increase.) 2 (non-gloss definition: Used to indicate higher position or direction, literally or figuratively.)
Usage examples of "up-".
Why were thousands of inhabitants deceived into believing that Moscow would not be given up- and thereby ruined?
There Platon Karataev was sitting covered up- head and all- with his greatcoat as if it were a vestment, telling the soldiers in his effective and pleasant though now feeble voice a story Pierre knew.