[d]→[ʃ]Certainty: 4/5Commonality: 2/5

Yod-Coalescence Palatalization Affrication Germanic

Voiced alveolar plosive to Voiceless postalveolar fricative

The voiced alveolar plosive [d] shifts to the voiceless postalveolar fricative [ʃ] through yod-coalescence, a well-documented palatalization process in English where /d/ coalesces with a following /j/ to form the affricate /dʒ/, which can further reduce to [ʃ] in rapid or casual speech contexts.

Phonetic Effects

Palatalization, Affrication, Spirantization

Language Examples

English (yod-coalescence) Germanic

/dj/ (as in "did you")→[dʒ] → [ʃ] (rapid speech)— Yod-coalescence in rapid speech where /dj/ coalesces to /dʒ/, and in casual registers may further reduce toward [ʃ]

/sj/ (as in "-sion" words)→[ʃ]— Historical evolution from Old French /sjon/ → English /ʃən/ (as in "mission", "passion")

English (allophonic) Germanic

[d] before /j/→[dʒ] ~ [ʃ]— Ongoing allophonic process in Modern English before high front vowels and palatal approximants

Related Transformations

Reverse Parallel palatalization t+j → tʃ Parallel palatalization s+j → ʃ

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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