___ 1 (speed of sound) Crossword Clue Answer
The verified answer to this New York Times crossword clue, with its letter count, appearance history and related clues from the same puzzle.
THE CLUE
“___ 1 (speed of sound)”
THE ANSWER
MACH
The answer to “___ 1 (speed of sound)” is MACH.
Checked against the published NYT solution
RECENT USAGE IN NYT PUZZLES2 DATES
Every date this clue has appeared, with the answer we verified that day.
NYT Crossword December 1 2025MACHFull puzzle ›NYT Mini June 16 2026MACHFull puzzle ›About this clueThe clue “___ 1 (speed of sound)” most recently appeared in the NYT Crossword on December 1 2025. The verified answer is a 4 letter word. We have tracked this clue 2 times across the NYT Crossword, Mini and Midi puzzles, and the answer above matches the officially published New York Times solution for its latest appearance. Curious about the word itself? Look up Mach in our dictionary for definitions, syllables and more.
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