Stress Rules — Patterns in Multi-Syllable Words
Master suffix-based stress rules that let you predict stress on ANY word.
Opening Hook
How do you pronounce “photographic”?
If you said /ˌfəʊtəˈɡræfɪk/, you’re right. But how did you know? The base word “photograph” has stress on the 1st syllable. “Photography” has stress on the 2nd. And “photographic” has stress on the 3rd.
The stress moves! And there are rules for this. Today, you’ll learn the most powerful stress rules in English.
Suffix-Based Stress Rules
The suffix (ending) of a word often determines where the stress goes. This is incredibly useful because it means you can predict the stress of unfamiliar words.
Rule 1: -tion / -sion → Stress on the syllable BEFORE the suffix
| Word | Stress | Syllable before suffix |
|---|---|---|
| eduCAtion | /ˌedʒuˈkeɪʃən/ | -ca- |
| deCIsion | /dɪˈsɪʒən/ | -ci- |
| inFORmation | /ˌɪnfəˈmeɪʃən/ | -ma- |
| comMUnication | /kəˌmjuːnɪˈkeɪʃən/ | -ca- |
| proDUCtion | /prəˈdʌkʃən/ | -duc- |
| reLAXation | /ˌrɪlækˈseɪʃən/ | -xa- |
| perMISsion | /pəˈmɪʃən/ | -mis- |
| conGRESsional | /kənˈɡreʃənəl/ | -gres- |
Rule 2: -ic → Stress on the syllable BEFORE the suffix
| Word | Stress |
|---|---|
| econOMic | /ˌiːkəˈnɒmɪk/ |
| scienTIfic | /ˌsaɪənˈtɪfɪk/ |
| roMANtic | /rəʊˈmæntɪk/ |
| draMAtic | /drəˈmætɪk/ |
| fanTAStic | /fænˈtæstɪk/ |
| paTHETIC | /pəˈθetɪk/ |
| characTERistic | /ˌkærəktəˈrɪstɪk/ |
Rule 3: -ity → Stress on the syllable BEFORE the suffix
| Word | Stress |
|---|---|
| univerSIty | /ˌjuːnɪˈvɜːsɪti/ |
| opporTUnity | /ˌɒpəˈtjuːnɪti/ |
| elecTRIcity | /ɪˌlekˈtrɪsɪti/ |
| curiOSty | /ˌkjʊəriˈɒsɪti/ |
| acTIvity | /ækˈtɪvɪti/ |
| naTUral | /ˈnætʃərəl/ |
Rule 4: -ical → Stress on the syllable BEFORE the suffix
| Word | Stress |
|---|---|
| BIOlogical | /ˌbaɪəˈlɒdʒɪkəl/ |
| eCOlogical | /ˌiːkəˈlɒdʒɪkəl/ |
| geoMEtrical | /ˌdʒiːəˈmetrɪkəl/ |
| poLIitical | /pəˈlɪtɪkəl/ |
| pracTIcal | /ˈpræktɪkəl/ |
Rule 5: -ious / -eous → Stress on the syllable BEFORE the suffix
| Word | Stress |
|---|---|
| reLIgious | /rɪˈlɪdʒəs/ |
| couRAgeous | /kəˈreɪdʒəs/ |
| graCIOUS | /ˈɡreɪʃəs/ |
| amBItious | /æmˈbɪʃəs/ |
Rule 6: -graphy → Stress on the syllable BEFORE the suffix
| Word | Stress |
|---|---|
| phoTOgraphy | /fəˈtɒɡrəfi/ |
| geOGraphy | /dʒiˈɒɡrəfi/ |
| biOGraphy | /baɪˈɒɡrəfi/ |
| phoTOgraphic | /ˌfəʊtəˈɡræfɪk/ |
Rule 7: -ize → Stress on the syllable BEFORE the suffix
| Word | Stress |
|---|---|
| REalize | /ˈriːəlaɪz/ |
| MOdernize | /ˈmɒdənaɪz/ |
| recOGnize | /ˈrekəɡnaɪz/ |
| characTErize | /ˈkærəktəraɪz/ |
Rule 8: -ee → Stress ON the suffix
| Word | Stress |
|---|---|
| emploYEE | /ˌemplɔɪˈiː/ |
| refuGEE | /ˌrefjuˈdʒiː/ |
| traiNEE | /ˌtreɪˈniː/ |
| inTErnee | /ˌɪntəˈniː/ |
Rule 9: -eer → Stress ON the suffix
| Word | Stress |
|---|---|
| engiNEER | /ˌendʒɪˈnɪə/ |
| volunTEER | /ˌvɒlənˈtɪə/ |
| pioNEER | /ˌpaɪəˈnɪə/ |
Rule 10: -ese → Stress ON the suffix
| Word | Stress |
|---|---|
| ChiNESE | /ˌtʃaɪˈniːz/ |
| JapaNESE | /ˌdʒæpəˈniːz/ |
| porTESE | /ˌpɔːtəˈɡiːz/ |
Stress Shifts in Word Families
One of the most fascinating aspects of English stress: when you add suffixes, the stress often MOVES.
| Base word | + -y | + -ic | + -ity | + -ical |
|---|---|---|---|---|
| PHOtograph | phoTOGraphy | photoGRAPHic | — | — |
| EConomy | — | ecoNOmical | econoMIcity | — |
| DEMocrat | — | demoCRAtic | deMOcracy | — |
| TELEscope | — | teleSCOpic | — | — |
| BIology | — | bioLOgical | — | — |
| HIStery | — | hisTORical | — | — |
Think about it: “PHOtograph” → “phoTOgraphy” → “photoGRAPHic” — the stress moves rightward! This is why English stress can seem unpredictable. But the suffix rules explain it.
Compound Words
| Type | Stress pattern | Examples |
|---|---|---|
| Compound noun | Stress on 1st element | BLACKboard, GREENhouse, FOOTball, KEYboard |
| Compound adjective | Stress on 1st element | well-KNOWN, hard-WORKing, fast-MOVing |
| Compound verb | Stress on 2nd element | underSTAND, overLOOK, outPERFORM |
Think about it: “BLACKboard” (a board that’s black and used in class) vs “black BOARD” (any board that’s black). The stress tells you it’s a compound noun!
Practice: Apply the Rules
Predict the stress using the suffix rules:
- “democracy” → -cy → stress on syllable before: deMOcracy
- “romantic” → -ic → stress on syllable before: roMANtic
- “communication” → -tion → stress before: comMUnication
- “employee” → -ee → stress ON suffix: emploYEE
- “geography” → -graphy → stress before: geOGraphy
- “characteristic” → -ic → stress before: characTERistic
Practice: Stress Shift
How does the stress change?
- “PHOTograph” → “phoTOgraphy” → “photoGRAPHIC”
- “EConomy” → “ecoNOmic” → “econoMIcity”
- “DEMocrat” → “deMOcracy” → “demoCRAtic”
🏅 Badge Earned: “Rule Master”
You can now predict stress using suffix rules!
Key Takeaways
- Suffixes determine stress — learn the rules and you can predict stress.
- -tion, -sion, -ic, -ity, -ical → stress on the syllable BEFORE the suffix.
- -ee, -eer, -ese → stress ON the suffix.
- Stress shifts when suffixes are added to a base word.
- Compound nouns stress the 1st element; compound verbs stress the 2nd.
What’s Next
In Lesson 6, we’ll move from word stress to sentence stress — how English rhythm works in connected speech.