be up to

1) (to be busy or occupied with (an activity etc): What is he up to now?) vera upptekinn við

2) (to be capable of: He isn't quite up to the job.) hæfur í/til

3) (to reach the standard of: This work isn't up to your best.) í samræmi við

4) (to be the duty or privilege of: It's up to you to decide; The final choice is up to him.) vera á valdi/í verkahring (e-s)