infirm of purpose

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The language of the play was at times mock Shakespearean, although not in the league of Lady Macbeth's 'infirm of purpose give me the daggers' in the Scottish play
Taking none too kindly to her husband's forebodings of woe--"if we should fail" is not a phrase she countenances lightly--Bond's Lady Macbeth lets rip at the notion that any male in her presence could be "infirm of purpose," as if determined to scare him into action.