up-

prefix

1 making 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: up-market (=suitable for the higher social groups)

—compare down­