WordVale
Through, though, thought, tough, trough. Five words, one spelling pattern, five different sounds. No other major European language does this to its learners, and it isn't random — it's the fossil record of several historical accidents layered on top of each other.
The printing press arrived at the worst possible moment
Caxton set up England's first press in 1476, and spellings began to fix in place. Unfortunately English pronunciation was in the middle of the Great Vowel Shift — a wholesale rearrangement of every long vowel that ran from roughly 1400 to 1700. Spelling froze while the sounds kept moving underneath it.
That's why name doesn't rhyme with its spelling: it was once said closer to "nah-muh". Why meet and meat are spelled differently but sound identical: they were once different sounds. The spellings record a pronunciation nobody has used for five hundred years.
The silent letters were once spoken
The k in knee, knight and know was pronounced. So was the gh in night — a throaty sound like the ch in Scottish loch. So was the w in write. Those sounds fell out of the language between 1500 and 1700; the letters stayed.
This is why -ough is chaos: the gh once had a consistent sound, and when it disappeared it left different residues in different words depending on the surrounding vowel and the region the word came from.
Some silent letters were never spoken at all
The worst category. Renaissance scholars, enthusiastic about Latin, inserted letters into perfectly good English words to make them look more classical. Debt and doubt were dette and doute from French, and the b was added to point at Latin debitum and dubitare. Nobody has ever pronounced it. The s in island is the same vandalism — the word is Germanic and had nothing to do with Latin insula.
English borrowed from everywhere and kept the receipts
Most languages absorb a loanword and respell it to fit. English keeps the original spelling and approximates the sound. So you get French -eau in bureau, Greek ph in photograph, Italian -etto in spaghetti, and Nahuatl by way of Spanish in chocolate. Each borrowing brings its own spelling conventions, and English simply stacks them.
What this means for you, practically
Stop trying to derive pronunciation from spelling. It doesn't work, and the effort is better spent elsewhere. Three things that do work:
- Learn the sound and the spelling as separate facts about the same word, acquired at the same time. Never read a new word silently and move on.
- Use a plain respelling rather than IPA unless you already read IPA fluently. Ephemeral is ih·FEM·er·uhl — anyone can read that, and it puts the stress where it belongs.
- Learn word families together. Photograph, photography, photographic shift their stress and change their vowels, and learning them as a set teaches the pattern.