[r]→[a]Certainty: 5/5Commonality: 5/5

Alveolar trill to Open front unrounded vowel

The shift from the rhotic consonant [r] to the open central vowel [a] (or the near-open central [ɐ]) is a widespread form of r-vocalization. It typically occurs in syllable-final or post-vocalic positions where the rhotic articulation weakens into a vocalic residue, a process that defines the soundscape of non-rhotic English and modern German.

Phonetic Effects

Vocalization, R-dropping, Centralization

Language Examples

Standard German Germanic

Vater [r]→[ˈfaːtɐ]— The 'Tiefschwa' [ɐ] is the standard vocalized realization of final -er in German.

hier→[hiːɐ̯]

English (RP / Australian) Germanic

car [ɹ]→[kɑː]— Loss of the rhotic consonant results in the lengthening and stabilization of the open back vowel.

hard→[hɑːd]

Related Transformations

Reverse Related: Reduction to Schwa

More Germanic Shifts

[a] → [ã] — Assimilatory Nasalization [a] → [∅] — Elision [a] → [ʔ] — Glottalization [a] → [ə] — Vowel Reduction [ʕ] → [a] — Vocalization

Sources & References

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