For- vs Fore-: Why Forget Is for-GET but Forecast Is FORE-cast

Why does forget start with a quiet, weak syllable, while forecast starts with a loud one that sounds like the number four? Both begin with the letters for-, but English has two different prefixes hiding behind that spelling. The old prefix for- (as in forget, forgive, forbid) is weak and the stress goes to the second syllable. The prefix fore- ("before" or "in front", as in forecast, forehead, foresee) keeps a full vowel, and the stress depends on whether the word is a noun or a verb.

If you mix them up, you get "FOR-get" (it sounds like a foreign accent) or "fo-CAST" (it sounds wrong to native ears). A two-minute lesson fixes both.

The Rule in Short

1. for- (away, completely, not) = weak /fɚ/, and the stress goes on the base word: for-GET /fɚˈɡɛt/, for-GIVE /fɚˈɡɪv/, for-BID /fɚˈbɪd/, for-SAKE /fɚˈseɪk/.
2. fore- (before, in front) = full /fɔr/, the same sound as four or for in careful speech. The vowel never reduces.
3. fore- nouns and adjectives: stress the first syllable. FORE-cast /ˈfɔrˌkæst/, FORE-head /ˈfɔrɪd/, FORE-ground /ˈfɔrˌɡraʊnd/, FORE-man /ˈfɔrmən/, FORE-word /ˈfɔrˌwɝd/.
4. fore- verbs: stress the second syllable. fore-SEE /fɔrˈsi/, fore-TELL /fɔrˈtɛl/, fore-WARN /fɔrˈwɔrn/, fore-SHADow /fɔrˈʃædoʊ/. Forecast can be both: noun FORE-cast, verb fore-CAST (or FORE-cast).
5. Quick test: if the word means "before or in front" (fore = "ahead"), say /fɔr/. If the base word is a verb with the meaning "away" or "wrongly", say /fɚ/.

Why It Works

Two prefixes, two origins

Old English had two unrelated prefixes: for- (intensifying or negative: forbid = "order not to", forgive = "give up resentment", forget = "lose hold of") and fore- ("before"). Over the centuries they ended up spelled almost the same, but the pronunciation kept them apart. The weak for- is a classic unstressed prefix, like be- and de- (see be- prefix), while fore- carries meaning and keeps its vowel, like pre- in preview.

Why the stress moves with the part of speech

English nouns that come from a prefix plus a base tend to take first-syllable stress (REcord, PREsent), while verbs stress the second syllable (reCORD, preSENT). The fore- family follows the same pattern: FORE-cast (noun) and fore-SEE (verb). You can read more in our guide to the noun-verb stress shift.

The R-colored vowel makes the difference audible

In for- the vowel before r is reduced to the r-colored schwa /ɚ/, the same sound as the last syllable of teacher. In fore-, the vowel stays /ɔ/ (as in door, four). Hold your lips rounded for fore-, and relax them for for-.

Pattern Table

Exceptions

• Foreign /ˈfɔrən/ looks like fore- + ign, but it has no prefix. It is a French loanword with a silent g, and the stress is on the first syllable. It rhymes with warren.
• Forest, forum, formal, forty, forward and forfeit are not built with either prefix. They begin with /fɔr/ and stress the first syllable: forest /ˈfɔrɪst/, forum /ˈfɔrəm/, formal /ˈfɔrməl/, forfeit /ˈfɔrfɪt/.
• Forgo and forego are pronounced the same, /fɔrˈɡoʊ/, but they have different spellings and meanings: forgo = "do without", forego = "come before". Both use the full /fɔr/ vowel in careful speech.
• Forlorn may be said as /fɚˈlɔrn/ or /fɔrˈlɔrn/. Both are accepted.
• Forehead has two accepted pronunciations: /ˈfɔrɪd/ (rhyming with horrid) and /ˈfɔrˌhɛd/ (a spelling pronunciation). Native speakers use both.
• Foreword /ˈfɔrˌwɝd/ ("a short text at the start of a book") sounds almost like forward /ˈfɔrwɚd/. Context tells them apart.

Common Learner Mistakes

• Stressing the first syllable of for- verbs: "FOR-get", "FOR-give". Stress the second syllable: for-GET, for-GIVE.
• Reducing fore-: "fer-cast" for forecast. Keep the rounded /ɔ/: FOR-cast.
• Spanish and Portuguese speakers read the o in for- as a full /o/ ("fohr-GET"). English needs a weak, r-colored vowel, quick and unstressed.
• French speakers pronounce forecast with the final stress typical of French (prévoir, prévision), saying "for-KAST". English puts the stress on FORE in the noun.
• German speakers have a helpful parallel: German ver- (vergessen, verbieten) is an unstressed prefix like English for-, and German vor- (Vorhersage, Vorsicht) is stressed like English fore-. Use that link.
• Spelling pronunciation: saying foreign as "for-EYN" or "for-eign" with the g. Say FOR-un.

How to Practice

1. Say it with a drumbeat. For forget, tap quietly on for and strongly on get. For forecast, tap strongly on fore, then lightly on cast.
2. Check your lips. Round your lips tightly for fore- (like saying "four"). Relax them for for-.
3. Pair drill. Say forget / forecast, forgive / foresee, forbid / forehead. Notice how the stress flips.
4. Noun-verb switch. Say The FORE-cast is rain and They fore-CAST rain.
5. Build the base. Start with the base word (get, give, bid) and add a quick /fɚ/ in front.
6. Record yourself reading the practice sentences below.

Practice

Practice Sentences

• Don't forget the weather forecast before the trip.
• I forgive you, but I can't foresee the future.
• The foreman forbids smoking in the foreground area.
• He has a scar on his forehead from a foreign city.
• The forecast was wrong, so please forgive the confusion.
• We forecast a record year and foresee no problems.

Quick Summary

• for- (forget, forgive, forbid) is weak /fɚ/ and the stress goes on the second syllable.
• fore- (forecast, forehead, foresee) is full /fɔr/ and means "before" or "in front".
• Fore- nouns stress the first syllable (FORE-cast); fore- verbs stress the second (fore-SEE).
• Exceptions: foreign, forest, forward are not prefix words; forehead has two accepted pronunciations.
• Round your lips for fore-, relax them for for-.