Final answer:
Lady Macbeth's handwashing symbolizes her futile attempts to cleanse herself of the psychological guilt from the murders she has orchestrated with Macbeth, representing the permanent nature of her actions.
Step-by-step explanation:
Symbolism of Lady Macbeth's Handwashing
The act of Lady Macbeth washing her hands is a symbolic gesture that represents her attempt to cleanse herself of the guilt and remorse over the murders she and Macbeth have committed.
This behavior echoes earlier in the play when she counsels Macbeth to wash his hands to remove the physical evidence of murder, saying, "My hands are of your colour; but I shame to wear a heart so white." She is referring to the bloodied state of their hands and her disdain for cowardice or regret.
As the play progresses, Lady Macbeth's handwashing becomes more obsessive, as she cannot wash away her psychological guilt, symbolizing the indelible nature of her actions.
It serves as a stark contrast to her earlier assertiveness and her desire to suppress any feelings of remorse, ultimately highlighting the overwhelming power of guilt.