(a) wash (sth) up phrasal verb [M]
to clean the plates, pans, and other things that you have used for cooking and eating:
He washed up his mug and put it back on the shelf. washing-up UK
noun (US dishes)
the act of cleaning plates, pans, glasses, knives, forks' etc. after a meal, or the items needing to be washed:
You dothe washing-up and I'll do the drying. (b) washing
1 (US ALSO the wash) the act of washing clothes: Doingthe washing is such a bore!
US ALSO wash) clothes, sheets, etc. that need to be or have just been washed:
I dothe washing and then I hang/peg it out in the garden.
To sum up, your first sentence suggests she's washing clothes whereas the second sentences implies she's washing pots.
Hope this helps!
Best regards! :up:
"Washing up" is mostly BrE, I think. I've heard it in films and such referring to washing the dishes.
In any case, "washing up" is rarely used in AmE. If you're going to wash clothes, you say "I'm going to do the laundry" or "My mom does the wash every Saturday." If you're going to clean up after dinner, you say "I'm going to do the dishes" or "I'll load the dishwasher, you go relax."