Trident-shaped Greek letters

The answer to “Trident-shaped Greek letters” in the The Washington Post crossword is PSIS — a 4-letter word. It most recently appeared in the The Washington Post crossword on September 27, 2026, a Sunday puzzle, at 111-Down. Below you'll find why that fill fits, every other answer we've recorded for this clue, and links into the puzzle it came from.

“Trident-shaped Greek letters” answer

PSIS (4 letters)

Reveal the solution one letter at a time with the tiles above if you'd rather nudge yourself toward it than see the whole word at once. Just want it outright? The answer is PSIS.

What does PSIS mean?

Reading the plain dictionary sense of PSIS is often the fastest way to see why it answers this clue.

When else has “Trident-shaped Greek letters” appeared?

The Washington Post reuses clues across dates, sometimes with a different answer depending on the grid. Here's where this exact clue has shown up, and what the answer was each time — handy when you're checking whether today's fill is the only one.

September 27, 2026 (most recent) → PSIS. We haven't indexed another appearance of this exact clue yet.

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