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Digraphs 33 words

ph = /f/

Rule Core

ph = /f/ is a stable phonics rule rooted in Greek-origin spellings. The letter p is silent; ph functions as a single grapheme representing the voiceless fricative /f/, regardless of stress or word length.

Articulation Guide

To produce /f/, place the upper teeth lightly on the lower lip and push continuous air through a narrow gap. The vocal cords do not vibrate. Avoid any plosive onset; there is no /p/ sound.

Word Analysis

In atmosphere and atmospheric, ph reflects the Greek root sphaira and is consistently pronounced /f/. In autobiographic, the -graphic element contains ph, again realized as /f/, linking sound to meaning (writing, recording).

Pitfall Alerts

Do not pronounce ph as /p+h/ or confuse it with /v/. In fast speech, learners may weaken it to /h*, which is incorrect.

Phonics Breakdown

Upper teeth on lower lip, continuous airflow, no voicing.

Sound Reference

  • Memorize ph as a single grapheme, not p + h.
  • Expect /f/ especially in Greek-derived academic words.

Common Mistakes

Pronouncing ph as /p/ or /pəh/.
Confusing /f/ with /v/.

Example Words

atmosphere atmospheric autobiographic biography dolphin elephant emphatic graph hyphen metaphor

All Words (33)

atmosphere atmospheric autobiographic biography dolphin elephant emphatic graph hyphen metaphor of pamphlet paragraph pharmaceutical pharmacy phase philosopher philosophical phone photo photograph physician physicist physiological physiology prophet stephen sulphur telegraph telegraphy telephone thief typhoon