| Subject | English | Russian |
| media. | big challenge | большая угроза (bigmaxus) |
| cliche. | big challenge | трудная задача (Creating sustainable jobs will be the biggest challenge for this government. ART Vancouver) |
| gen. | big challenge | сложная задача (Creating sustainable jobs will be the biggest challenge for this government. ART Vancouver) |
| busin. | big challenge for | очень сложная задача для (smb, кого-л.) |