up to

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

1. busy or occupied with (Freq. 3)
- what have you been up to?
- up to no good
• Similar to:
busy
2. having the requisite qualities for (Freq. 2)
- equal to the task
- the work isn't up to the standard I require
• Syn:
adequate to, capable, equal to
• Similar to:
adequate, equal