Answer: millstones

AnswerCrossword Clue
MILLSTONESHeavy burdens.
MILLSTONESNeckwear, proverbially.
MILLSTONESBrotherly quartet's sounds are real crushers
millstonesEach of two circular stones used for grinding grain
millstonesMILLSTONE, one of a pair of heavy flat disc-shaped stones that are rotated one against the other to grind grain
millstonesA heavy and inescapable responsibility