Vaughan writes about someone who watches others constantly, hunting for any flaw, however tiny, to turn against them. The poem opens by addressing "you" and then slips into "us" and finally "me," so the damage feels like it moves closer, from a general warning to a personal wound. The woman at its center is never named, which makes her seem like a force more than a single person.
The repeated phrase "every minute / of every hour" works like a ticking clock, and it makes the criticism feel relentless and inescapable. Her cruelty is casual: she cuts people "as though she were cutting air," as if they couldn't feel anything. The image of reputations wilting like neglected plants adds a slow, quiet sense of decay.
By the end, the speaker is "lying in a heap," dulled and useless. The mood is exhausted and bitter, the sound of someone worn down rather than loudly angry. Repeating the air image in the last line shows how little she noticed the harm she did.