The Silent C in "scissors": Why That Letter Never Makes a Sound

You almost certainly know what scissors, science, and muscle mean, and you can spell them without thinking. But say them out loud, and it's common to slip in an extra /k/ sound, or an extra syllable, where a native speaker produces nothing at all. That middle c isn't quiet — it's silent.

This isn't a handful of random exceptions. It's a small, well-defined category of "silent C" words, and there's a clear reason behind it.

Pattern 1: sc before e/i/y — the c is a shadow of the s

English already has a rule that c softens to /s/ before e, i, or y (the same rule behind hard vs. soft c and g). But when c is preceded by s, something has to give: s already says /s/, and now c wants to say /s/ too. English resolves the collision by keeping only one sound. So sc before e/i/y is pronounced as a single /s/ — the c survives in spelling only.

• scissors /ˈsɪzəz/ — note the irregular s at the end, pronounced /z/
• science /ˈsaɪəns/ — the opening sc is just /s/
• scene /siːn/ — not "sk-ene"
• muscle /ˈmʌsəl/ — no /k/ in the middle
• ascend /əˈsend/, crescent /ˈkresənt/, fluorescent /flʊəˈresənt/, obscene /əbˈsiːn/

Pattern 2: a handful of words where c disappears with no excuse at all

Outside the sc pattern, a few words drop the c entirely, with no neighboring s to blame — just a fossil of older spelling:

• indict /ɪnˈdaɪt/ — the c is fully silent; most native speakers pause the first time they actually notice the spelling
• Connecticut /kəˈnetɪkət/ — the first c isn't pronounced
• czar /zɑː/ — here c doesn't even stand in for /s/; the word is carried entirely by the /z/

How to predict it

Check what comes before the c. If it's s, and the next letter is e, i, or y — scissors, science, scene — the c almost certainly disappears into a single /s/. If sc is followed by a, o, or u instead (scan, score, scuba), both letters pull their weight and you get /sk/. The lone exceptions — indict, Connecticut, czar — have no s to hide behind, so they just have to be memorized one by one.

How to practise it

Say scissors, science, and muscle three times in a row, and deliberately do nothing at the c — slide straight from the s into the vowel that follows. You'll notice the word actually flows faster once you stop spending effort on a /k/ that was never there.

Not sure which letters in a word are silent? PHONO reads any English text through your camera and marks every word with IPA, so you can see exactly which letters disappear, in both US and UK audio.

Download: https://apps.apple.com/us/app/phono-english-phonetics-ipa/id6783243417 · phono.douhouse.com