The "ch" that never says "ch"

English got two completely different "ch" sounds from two completely different places. The one in "church" and "chair" is native English. But Greek gave English a whole separate set of "ch" words — spelled the same way, sounding nothing alike — because Greek's letter chi didn't make an English "ch" sound at all. It made a hard "k." So "chaos" was never meant to start like "chair." It starts like "kayak."

The rule

In Greek-derived words, the letters "ch" almost always represent a plain /k/ sound, not the English "ch" sound (technically called an affricate) heard in native English words like "chair" or "church." "Chaos" is pronounced "KAY-ahss," not "CHAY-ahss." This same Greek "ch" = /k/ pattern shows up throughout science and school vocabulary — "chemistry," "chorus," "echo," "chameleon" — because so much of that vocabulary is Greek in origin. The rule is specifically about words that came into English straight from Greek (often through Latin) — it doesn't cover Greek-rooted words that took a detour through French first. "Machine" (ultimately from Greek "mēchanē") picked up the French "ch" sound instead — the "sh" in "shoe." "Chart" and "charter" (from Greek "khartēs") ended up with the native English "ch" from "chair" instead of /k/. Both are real exceptions worth knowing, not just "chaos"-style words.

Hear the difference

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