A teacher answered that cuid literally means "a portion of".
Well upon showing the above Rosetta Slide to a friend, she asked me, well how come on the top middle slide the object is plural but the bottom right and left slide, the object is not plural.
This later, and quickly became summed up by another friend who said:
I was so happy to realize it really is that simple! So when you move on to sentences bigger than the basic to be, or "X is" ... this is good early rule to tackle.