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Eponymous physicist Mach WSJ Crossword Clue

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Frequently Asked Questions About This Clue

The most common and recent 5-letter answer for "Eponymous physicist Mach" is ERNST.
The clue refers to the physicist Ernst Mach, known for his work in physics and philosophy. The word 'eponymous' suggests that something is named after this person, and in this case, it is the 'Mach number,' which is a dimensionless unit representing the ratio of an object's speed to the speed of sound.
This clue was last seen in the WSJ Crossword on September 08, 2026.
Ernst is a given name of German origin, often associated with notable figures in science and philosophy.
Dada’s Max, Young's partner in accounting, Dada artist Max, Physicist Mach, Dada pioneer Max

The clue “Eponymous physicist Mach” is a classic crossword staple, frequently appearing in puzzles like the WSJ crossword. For the puzzle dated September 8 2026, the definitive 5-letter answer is: ERNST.

Expert Tip: When you’re stuck, try to analyze the structure of the clue itself. Is it a direct definition, a pun, a fill-in-the-blank, or a pop culture reference? Identifying the type of clue you’re dealing with is a key skill for improving your solving speed.