9 Down

NYT Daily ? September 10, 2025

Suffix with sulf-

Answer:

-IDE

Hint:

Think of the ending used in chemistry for binary compounds, like what you’d find in sodium chloride or hydrogen sulfide.

Explanation:

The clue asks for a suffix that follows "sulf-" to form a complete word. In chemistry, "sulfide" is a common term where "-ide" is added to "sulf-" to name compounds like hydrogen sulfide. The answer is simply the suffix itself, "-ide," which appears in many chemical names for binary compounds. Think of it as the ending that turns "sulf-" into a recognizable scientific term.

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General solving tip

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