Upright the Six of Swords is read as transition, moving on and a gradual passage away from difficulty toward calmer circumstances; reversed, as an inability to move on, a journey postponed, or old troubles carried unchanged into a new situation.
The detail of the swords traveling in the boat rather than being left on the departed shore is central to how most experienced readers use this card: it is generally not read as a promise that the trouble is over, only that it is being carried somewhere more survivable, and readers commonly caution querents against expecting the Six of Swords to mean a clean break. This more qualified reading is closer to Waite's own printed meaning, a journey by water, a route or way, expedient, without the emotional resolution some contemporary interpretations add.
Because the picture shows passengers rather than the ferryman as its emotional center, the card is frequently read from their point of view, as someone being carried rather than steering, which some readers use to raise a gentle question about how much agency the querent currently has in their own transition, versus how much they are, for the moment, simply being moved along.
Reversed, the card's stalled crossing is read either as external obstruction or as internal resistance to leaving, and the distinction usually has to be settled by the surrounding cards rather than by this one alone.