A subdwarf is a star that is smaller and fainter than a dwarf star.
Subdwarfs are not as bright or big as regular dwarf stars.
Examples:
The subdwarf is not as bright as the dwarf star.
I read about a subdwarf in my book.
The subdwarf is far away in the sky.
The subdwarf is like the little brother of the dwarf star.
The subdwarf is so small, you can't even see it!
The subdwarf is not as important as the dwarf star.