__ Stains; Marks That Are Hard to Get Rid of
This page is the CodyCross answer for the clue below from Making a Documentary, Group 1516, Puzzle 4 (Light Reflector).
Question is: __ Stains; Marks That Are Hard to Get Rid of
and the answer is: STUBBORN
Word Meaning:
STUBBORN — Refusing to move or to change one's opinion; obstinate; firmly resisting; persistent in doing something.
Definitions from Wiktionary.