[θ]→[f]Certainty: 5/5Commonality: 5/5

Voiceless dental fricative to Voiceless labiodental fricative

The shift from the voiceless dental fricative [θ] to the voiceless labiodental fricative [f] is a form of th-fronting. Acoustically, these two sounds are very similar, leading to their merger in many dialects and in the speech of children during language acquisition.

Phonetic Effects

Labialization, TH-fronting

Language Examples

London Cockney English Germanic

thin [θɪn]→fin [fɪn]— Classic London th-fronting.

African American Vernacular English Germanic

bath [bæθ]→baf [bæf]— Common in word-final position.

Related Transformations

Reverse Voiced equivalent

More Germanic Shifts

[a] → [ã] — Assimilatory Nasalization [a] → [∅] — Elision [a] → [ʔ] — Glottalization [a] → [ə] — Vowel Reduction [æ] → [ɛ] — Vowel Raising

Sources & References

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