up-up- /ʌp/ prefix 
1making something higher: 
to upgrade a job (=make it higher in importance)2[especially in adverbs and adjectives] at or towards the top or beginning of something: uphill upriver (=nearer to where the river starts)3[especially in verbs] taking something from its place or turning it upside down: an uprooted tree She upended the bucket.4[especially in adjectives and adverbs] at or towards the higher or better part of something: upmarket (=attracting richer people) → down-
1making something higher: to upgrade a job (=make it higher in importance)2[especially in adverbs and adjectives] at or towards the top or beginning of something: uphill upriver (=nearer to where the river starts)3[especially in verbs] taking something from its place or turning it upside down: an uprooted tree She upended the bucket.4[especially in adjectives and adverbs] at or towards the higher or better part of something: upmarket (=attracting richer people) → down-