Silent p pronunciation

English has a small but very consistent family of silent p's, and nearly all of them trace back to Greek. At the start of a word, the Greek clusters ps- and pn- are pronounced with just the s or the n: psychology begins with "sy-", not "psy-", and pneumonia begins with "noo-". Greek had these clusters pronounced in full — "psukhē" — but English never allowed p before s or n at the start of a word, so the p was dropped from speech the moment the words were borrowed, while the spelling preserved the Greek original. The p in receipt has a different, and curious, story: it was inserted by scholars, never spoken, exactly like the b in debt (see the silent b guide).

psychology is "sy-KOL-uh-jee", psychiatry is "sy-KY-uh-tree", psalm is "sahm", pseudonym is "SOO-doh-nim" and pterodactyl is "TER-oh-dak-til". The rule has no exceptions at the start of a word: written ps- or pt- always drops the p. That makes it one of the most dependable silent-letter rules in English — if you see a word beginning with ps, say only the s. The same principle extends through the whole scientific vocabulary built on Greek roots; the hardest words guide has a section of medical and technical examples.

The pn- cluster follows the same rule: pneumonia is "noo-MOH-nyuh" and pneumatic is "noo-MAT-ik". Both come from the Greek word for air or breath (pneuma), and both drop the p entirely. Learners who say "puh-neumonia" are doing exactly what the spelling invites and exactly what English never does. The rule of thumb that covers ps-, pn- and pt- at the start of a word: the first letter is always silent.

receipt is pronounced "ree-SEET" — the p is never spoken, despite sitting happily in the middle of the word where other silent letters would be pronounced. It is one of the great traps of English: the p was inserted into the spelling in the seventeenth century to echo the Latin receptum, and both English and French had already been saying the word with no p for centuries. ptarmigan (a bird of the Arctic) follows the same pattern — a silent p before t even mid-word — though it famously gained its p by mistake, copied from Greek-looking words. The mispronounced words guide lists receipt among the words most often read aloud incorrectly.

Here is the crucial warning: the p is silent only in those borrowed clusters. In native and Latin words, p before s or t is fully pronounced. adapt is "uh-DAPT", concept is "KON-sept", capture keeps its p and empty says it. The silent p is a property of word-initial Greek clusters and the handful of historical spellings like receipt — the moment p is a normal letter between syllables, it speaks. Contrasting pairs are the best teacher: psychology versus concept, receipt versus accept, pneumonia versus capture.

A few everyday words hide a silent p with no Greek involved. raspberry is "RAZ-ber-ee" — the p fell out of the cluster between s and b. cupboard is "KUB-erd", where the p of cup and the b of board collapsed together. And the French loanwords corps ("kor", with a silent p and silent s) and coup ("koo") keep the French habit of a silent final p. These are one-offs, not rules — exactly the kind of word the history of English spelling explains one by one.

Read slowly first. Pronounce each syllable deliberately before trying to blend them at full speed. Rushing hides the vowel and consonant shapes your ear needs to learn.

Record yourself. Most phones have a voice memo app — record a word, then compare it to the playback here. Hearing the gap between your version and the model accent makes targeted practice far easier.

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