Today's Word of the Day means...
In the mod. Scand. tongues, except Icelandic and Færöese, the reduced form pa, paa, corresponding to Eng. (colloq. or dial.) 'pon, 'po', has displaced the simple prep. å, aa = on. [OED]
To raise; increase: My confidence has upped itself (1925+)
[first adjective sense is based on up, ''effervescent, bubbling,'' used of beer and other drinks; later similar uses, from the 1940s, are based on the ''high'' produced by narcotics]