Meaning of OUT- in English
a prefixal use of out , adv., occurring in various senses in compounds ( outcast, outcome, outside ), and serving also to form many transitive verbs denoting a going beyond, surpassing, or outdoing in the particular action indicated ( outbid, outdo, outgeneral, outlast, outstay, outrate ).
[ ME; OE ut-; see OUT ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012