The Three of Swords, upright and reversed
Suit of swords2 min read

What the pierced heart card tends to cover, why its plainness is the point, and three ways to read it reversed.
Three swords through a red heart, grey rain behind it, no figure anywhere in the image. The Rider-Waite-Smith Three of Swords is one of the few cards in the deck with no person in it, and that absence does a lot of the work. There is nobody to identify with and nothing happening. The card shows a state rather than an event.
Upright, it tends to cover grief and the particular kind of pain that arrives with information. Swords are the suit of thought and speech, so this is hurt with words attached: something said out loud, a message read, a thing you worked out yourself and cannot now unknow. Three separate blades, not one, which readers often take as the several-sided quality of it, the way a single piece of news hurts in more than one place at once.
It is not a card that asks you to do anything. Next to an Eight of Cups or a Six of Swords, both cards about leaving, it often reads as the feeling you are carrying while you go. Next to a Ten of Pentacles or a Four of Wands, cards about settled arrangements, it can point at grief inside something otherwise stable, which is the version people are least willing to name.
Reversed, the blocked reading is the most common: the grief is present but not being let through. Held breath, a busy schedule, the fortnight where you are fine and then suddenly are not. The inward reading gives you pain nobody else knows about, sometimes about a situation you have never mentioned to the person involved. The dialled-down reading is worth keeping on the table too, because a reversed Three of Swords beside four calm cards is often just an old hurt that came up because you were thinking about something adjacent.
What it does not mean reversed is recovery arriving. That reading is popular and it flattens the card. If your spread wants to show healing, the deck has cards for it, the Star and the Four of Swords among them, and it tends to use those instead.
A practical note on drawing it: this is one of the cards most likely to make someone stop a reading. If it comes up in a self-reading and you feel your attention slide off it, write down what the image shows in plain terms before you move on. A heart, three swords, rain. Then name the thing you already know it is about. The card rarely tells you anything you had not half-noticed.