In English, the letters PH together usually make the /f/ sound, just like a single F. This comes from Ancient Greek, where the letter phi (Φ) was pronounced like F. English borrowed many Greek words and kept the PH spelling, even though we say it as F.

The rule is simple and reliable: PH almost always sounds like F in English words. It's a digraph (two letters, one sound) taught in phonics for reading and spelling.

Here are over 100 common examples:

The pattern holds strong in most cases. Rare exceptions exist (like “diphthong” sometimes said with /p/ or compound words like “uphold”), but PH equals /f/ covers nearly everything you'll encounter.

This helps with reading aloud, spelling tests, and teaching kids phonics. Once you spot PH, think F, words like phone or elephant suddenly make perfect sense.