Suffix stress shifts
Adding a suffix to a word often moves the main stress to a new syllable: PHOtograph becomes phoTOGraphy and then photoGRAPHic. Two rules cover most of the movement: suffixes like -tion, -sion, -cian, -ic and -graphy pull the stress onto the syllable immediately before them, while -ity and -ety place the stress three syllables from the end. The vowels that lose the stress collapse into schwa, which is why a word family can sound like several unrelated words.
One family, three different stresses
Play these three forms of the same word and listen to where the weight lands:
PHO-to-graph stresses the first syllable. pho-TOG-ra-phy stresses the second. pho-to-GRAPH-ic stresses the third. Same root, same spelling family — but every time a suffix goes on, the stress moves, and the vowels that lose the stress collapse into schwa /ə/. The first o of photograph is a full sound; in photography it is a barely-there schwa. This is why a word you know perfectly can become unrecognisable in another form, and why guessing the stress from the root does not work.
Suffixes that pull stress forward
The most reliable group in English: adding the suffix moves the stress so that it lands on the syllable just before the suffix. Learn the suffix, and you know the stress of every word built with it.
Suffixes that count back three
The -ity family plays by a different rule: the stress lands three syllables from the end. E-lectric, e-lec-TRI-ci-ty: the stress sits on the syllable before -ity when the word is long enough. A-BIL-i-ty, so-CI-e-ty, na-tion-AL-i-ty. The same counting-back pattern appears with -ify and -ize in some words, but -ity is the one worth memorising because it creates so many everyday words. Hear the family shift:
Hear the families move
The same root, restressed by each suffix. Play each family in order and notice two things: where the stress goes, and how the vowels that lose the stress flatten towards schwa.
Why this matters more than it looks
Stress-shifting suffixes mean you can rarely recycle the stress of a word you already know. Learners who stress photography on the first syllable because they know photograph are saying a word that native listeners have to fish for. The fix is cheap: when you learn a word, learn its suffix first — -tion and -ic force the stress one syllable before them; -ity forces it three from the end — then hear the word once and repeat it with an exaggerated stressed syllable. Dictionaries and the buttons on this page show the stress directly. For the full list of endings that behave this way, see the word stress guide, and to hear whether you can spot a shifted stress, take the listening quiz.
FAQ
Why does stress move when a suffix is added?
English inherited most of its -tion, -ic and -ity words from French and Latin, and those languages stress words by counting from the end rather than the beginning. When English borrowed them, it kept their stress patterns. The shaping of the word — how many syllables follow the stressed one — decides the stress, so adding a syllable at the end shifts everything before it.
Does every word ending in -tion stress the syllable before it?
Yes, with very few exceptions. Nation, education, information, decision, pronunciation — the main stress is always on the syllable directly before the -tion, no matter how long the word is. The same is true of -sion and -cian. It is one of the most dependable rules in English pronunciation.
What happens to vowels when stress moves away?
They reduce. A vowel that loses the stress becomes shorter, quieter and usually collapses into the schwa /ə/, the neutral sound of the first syllable of about. The first o of photograph is full; the same letter in photography is a schwa. This vowel flattening is part of what makes a restressed word sound like a different word.
How do I learn the stress of a word family without memorising every word?
Learn the suffix rules and count. For -tion, -ic, -graphy and friends, the stress sits on the syllable before the suffix. For -ity, count three syllables from the end. That covers the majority of shifted families; for the rest, learn the pattern from audio — hear the word, exaggerate the stressed syllable, and note where the schwas appear.
Quick pronunciation tips
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.
Focus on one accent. Jumping between American, British and Australian in the same session creates confusion. Pick the accent you encounter most and stick with it until the patterns feel natural.
Keep going
Every word above is a button. Set the accent and voice you want on the main screen, then come back — the guides use whatever you chose. To hear two accents against each other, use Compare; to test whether you can actually hear a contrast, use the listening quiz.
Sources and review
Last reviewed 2026-09-22 · Learn Pronounce