Measurement of speed in relation to sound Crossword clue · 4 letters

Answer

MACH

MACH, noun: Austrian physicist and philosopher who introduced the Mach number and who founded logical positivism. Definition from WordNet 3.1, Princeton University.

Measurement of speed in relation to sound is a crossword clue from Everyday Puzzles. The answer is MACH (4 letters). It last appeared on October 20, 2026 in the Daily Cladder and has been used 4 times since September 15, 2025.

Last seen October 20, 2026

Where this clue appeared

Everyday Puzzles Cladder, October 20, 2026
Everyday Puzzles Cladder, January 22, 2026
Everyday Puzzles Cladder, November 16, 2025
Everyday Puzzles Cladder, September 15, 2025

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October 20, 2026

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Clue stats

Times used: 4
Reuse rank: #1,734 of 33,516 clues
Average gap: 133 days
4 letters: 31% of all answers

Cladder 4

November → October, appearances per month

First recorded September 15, 2025 · Last seen October 20, 2026