Definition of up- in English:

up-

Syllabification: up-

prefix

1.1To a more recent time; to a newer or better state: upbeat update upgrade upscale
2(Added to nouns) denoting (direction of) motion up: upriver uphill upwind

Definition of up- in:

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Word of the day bimble
Pronunciation: ˈbimbəl
verb
walk or travel at a leisurely pace