UP-
Meaning of UP- in English
/ ʌp; NAmE / prefix
(in adjectives, verbs and related nouns) higher; upwards; towards the top of sth :
upland
upturned
upgrade
uphill
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005