[p]→[f]Certainty: 5/5Commonality: 5/5
Grimm's Law Spirantization Kartvelian Indo-European Germanic Iranian Austroasiatic English-based Creole Semitic
Voiceless bilabial plosive to Voiceless labiodental fricative
As part of Grimm's Law, Proto-Indo-European voiceless plosives became voiceless fricatives in Proto-Germanic.
Phonetic Effects
Fricativization
Language Examples
Bilabial stop [p] in certain phonological contexts→[f] or labial fricative in contact varieties— Georgian maintains a three-way laryngeal contrast (voiced/voiceless/ejective) in stops, but bilabial fricativization can occur in modern urban varieties under contact with Russian.
Proto-Viet-Muong *p→[f] (written ph)— Historical fricativization of initial *p. E.g., Proto-Vietic *pa → Vietnamese 'ba' [ɓa] (three) - wait, ba is b. 'phi' [fi] (to fly) from Middle Chinese or similar.
sapos [p]→[ˈsafos]— Free variation: /p/ and /f/ are often in free variation or act as allophones for many speakers (e.g., 'sapos' ~ 'safos' meaning 'if').
MHG pfunt [pf] (pound)→Yiddish funt [f]— Yiddish deaffricated MHG initial /pf/ → /f/ word-initially. E.g., MHG pfeffer → Yiddish fefer (pepper), MHG pflanze → Yiddish flants (plant). Medially/finally /pf/ → /p/.
פָּרַשׁ pārash [p] (horseman, word-initial)→[ɸ]/[f] in post-vocalic position— Beged-Kefet spirantization: pe (פ) is realized as [p] word-initially or after a consonant, and as [f] (or bilabial [ɸ]) after a vowel. Marked by dagesh: פּ [p] vs. פ [f]. The same root appears in Arabic as فَارِس fāris with /f/ in all positions, showing Arabic generalized the fricative while Hebrew preserves the allophonic alternation. Tiberian Hebrew pronunciation (c. 7th–10th century CE).
*paqīr (PS)→faqīr (Arabic)— Proto-Semitic *p → Arabic /f/ in all positions; Arabic has no /p/ phoneme. Cf. also Hebrew פָּרַשׁ pārash vs. Arabic فَارِس fāris (horseman).
*ph₂tḗr→father (English)— Latin pater, Greek patēr retain the [p].
*pisk-→fish (English)— Latin piscis.
PIE *p before consonant (e.g. *ptar-)→Proto-Iranian *f (e.g. *ftar-)— Partial Grimm's Law in Iranian: voiceless stop /p/ became fricative /f/ before another consonant. PIE *sapta 'seven' → Proto-Iranian *hafta (cf. Persian هفت haft, Avestan hapta). Compare Sanskrit sapta, which preserves *p.
PIE *pṇtí- 'path'→Avestan pantā / Old Persian *patha— The PIE aspirated *ph → Iranian /f/ in many cluster positions. Modern Persian panj 'five' < Proto-Iranian *panca, showing partial preservation of /p/ word-initially without a following consonant.
Related Transformations
More Semitic Shifts
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