The crossword solution for the term 'Macbeth Witches' Word' is TOIL, which is a four-letter word. TOIL is defined as hard and continuous work, especially physical labor. In William Shakespeare's play Macbeth, the three witches use the word TOIL to describe their work in creating mischief and chaos. The witches chant 'Double, double, TOIL and trouble; Fire burn, and cauldron bubble' to signify their magical powers.