"That I may pour my spirits in thine ear/And chastise with the valour on my tongue" ↝ [a1s5]
'Spirits' - imagery evokes demonic possession which shows how LM wants to overpower Macbeth with her own villainy.
'Chastise' - verb is emblematic of the power imbalance between Macbeth & LM which links to Macbeth being reprimanded by his wife.
'Valour' - noun has connotations on defiance, bravery & fearlessness which creates the impression tat LM intends on defying societal norms in terms of taking control of her husband.
"A little water clears us of this deed" ↝ [a2s2]
Her over-powering ambition obstructs her from seeing the genuine distress of her husband. She uses litotes (understatements) to downplay the murder. It's laced with irony as LM shifts to a melodramatic state of insanity & begins speaking in hyperbole as the guilt takes over.
"deed" ↝ LM fails to face up to the reality of it, she must placate it into less heinous words to keep her composure.
"While it was smiling in my face...plucked my nipple from his boneless gums & dashed the brains out" ↝ [a1s7]
Graphic imagery highlights LM's ruthlessness
Tender image of child contrasts with LM's brutality as she is willing to cruelly destroy something innocent in the pursuit of power
Reinforces her rejection of maternal instinct - Jacobean women supposed to be nurturing & passive - her words suggest that traditional femininity is incompatible power in a patriarchal world