1. having no choice but to ..., all one can do is ..., there's nothing to do except ...
2. having nothing but ..., there is only ..., having only ..., having no more than ...
1. thing, matter
2. incident, occurrence, event, something serious, trouble, crisis
3. circumstances, situation, state of affairs
4. work, business, affair
5. after an inflectable word, creates a noun phrase indicating something the speaker does not ...