Engraving with acid
THE ANSWER IS
The answer is ETCHING.
Tap reveal when you’re ready—the letters stay hidden until then.
Why it fits
ETCHING is the 7-letter answer to “Engraving with acid” in the February 28, 2021 Lexigo puzzle. Every answer must also trace a connected path across touching hexagons, with each word linking to its neighbors in the chain—so ETCHING both satisfies the clue and fits the day’s board.