My prefix is for great necessities,
My suffix is for dirty beasts,
My infix is for you and me,
My whole is found in libraries.
What am I?
I think the answer is
Musty
My prefix is for great necessities,
Must
My suffix is for dirty beasts,
Sty = where pigs are kept
My infix is for you and me,
Us
My whole is found in libraries.
Musty = "lacking freshness or vitality; old-fashioned"