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up-

1 making something higher :
to upgrade a job (=make it higher in importance)
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)
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.
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)
upmarket (=attracting richer people)