up

adj. (cannot stand alone)

abreast

1) up on (are you up on the news?)

dependent

2) up to (the decision is up to you; it's up to you to decide; it's up to you whether we go)

* * *

[ʌp]

(cannot stand alone) ['abreast'] up on (are you up on the news?)

['dependent'] up to (the decision is up to you; it's up to you to decide; it's up to you whether we go)