Vowel digraph pronunciation
A vowel digraph is two vowel letters spelling one sound, and each one has multiple pronunciations. ea is /iː/ in eat but /e/ in head and /eɪ/ in great; oo is /uː/ in moon but /ʊ/ in book, with blood and flood rhyming with mud; ou is /aʊ/ in house but /uː/ in group and /ʌ/ in young; ai is reliably /eɪ/ (rain) with only said, aisle and plaid to remember; ie is /iː/ in field but /aɪ/ at the end of a word (pie, lie). Learn each digraph's main sound, then memorise the small exception families.
Two vowels, one sound — and sometimes another
A vowel digraph is two vowel letters that spell one sound when they appear together — like the ea in eat or the oo in moon. The old classroom slogan that "when two vowels go walking, the first one does the talking" (ea spells ee, ai spells ay, ie spells ee) is true often enough to be useful and false often enough to embarrass you. English has around twenty vowel sounds but only five vowel letters, so digraphs are the spelling system's way of coping — which is exactly why each one has multiple pronunciations. The reliable approach is to learn the main sound of each digraph, then treat every word as a possible exception until you have heard it. This guide gives you the main sounds and the exceptions that actually occur in everyday words.
ea — three everyday sounds
/iː/ — the default, like the letter name E:
/e/ — the short e of bed, in very common words:
/eɪ/ — the sound of ay, in just three common words:
Before r, ea usually spells the /ɪə/ sound of , and , and in , and it spells /ɜː/. The head/bread group is the one that catches learners, because it looks identical to eat/sea. The vowel sounds guide explains where each of these vowels sits in the mouth.
oo — long, short, and the flood pair
/uː/ — the default:
/ʊ/ — the shorter, tenser vowel of book:
The famous stragglers and rhyme with mud, not food, and before r, oo takes the /ɔː/ of and . The book/look group is small but so frequent that it is worth memorising as a set.
ou — the digraph with five faces
/aʊ/ — the default, the sound of ow in cow:
/uː/ — oo, mainly in French and earlier borrowings:
/ʌ/ — the vowel of up, in common words:
/əʊ/ or /oʊ/ — the "oh" sound:
In unstressed positions, ou weakens to the schwa — the famous, nervous, curious type of ending, covered in the schwa guide. And the whole ough family (thought, tough, through, plough) is ou with a silent gh on the end — see the ough guide for that mess.
ai — the honest one
ai almost always spells /eɪ/: , , , , (in British English). Keep the handful of exceptions in mind — rhymes with bed, has a silent a and is pronounced like "I'll", and rhymes with bad. Comparatively, ai is the most dependable digraph in English, which is why it is a good default when you are unsure how to spell a /eɪ/ word.
ie — the rhyme and its enemies
/iː/ — in the body of a word:
/aɪ/ — at the end of a word, it spells the sound of eye:
The famous rule — "i before e except after c, when the sound is ee" — covers and , and the exceptions are famously few but famous: (short e), plus the -cience words like and , where the letters split into separate syllables.
Frequently asked questions
Why is ea pronounced differently in eat and head?
The ea spelling once represented a long vowel that split into several sounds as English pronunciation evolved, and the spelling stayed the same for all of them. Eat, head, great, hear, earth and heart are six words where identical letters produce five different vowels — history, not logic.
What is the rule for oo pronunciation?
The main rule is: oo is usually /uː/ (moon, food, soon). A small but common group takes the shorter /ʊ/ (book, look, good, foot, wood), and blood and flood rhyme with mud. Before r it is /ɔː/ (door, floor). Learn book and blood as exceptions to the moon pattern.
Is the "two vowels go walking" rule true?
Only about half the time. It holds for many ai and ie words and for ea in eat-type words, but ea in head, oo in book, ou in young and the whole ough family break it. Treat it as a starting guess, then confirm each word by ear.
How do I know which sound a digraph takes in a new word?
You cannot reliably — that is the honest answer. English digraphs are not predictable, and even native speakers guess wrong. The practical strategy is to learn the main sound of each digraph, remember the small exception families in this guide, and click any unfamiliar word to hear it.
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