The Universal Atlas of Phonetic Evolution
Back to Matrix [ð] → [s] Edit this Data

[s]→[ð]Certainty: 5/5Commonality: 3/5

Voiceless alveolar fricative to Voiced dental fricative

The phonetic transformation from the voiceless alveolar fricative /s/ to the voiced dental fricative /ð/ involves both a shift in the place of articulation from alveolar to dental, and a change in voicing from voiceless to voiced. This sound change can be influenced by processes such as dentalization and voicing assimilation, or it can occur as a lenition process.

Phonetic Effects

Voicing, Dentalization, Lenition, Place Assimilation

Language Examples

/s/→/ð/— In northern varieties, /s/ in Kiswahili-derived loanwords can shift to /ð/, such as 'sahani' becoming 'thaani'.
s→ð— This shift is common in northeastern groups (Groups 1, 4, 5, 7, and 14).
/s/→[ð]— Allophonic variation includes the lenition of /s/ to [ð].
s→ð— A historical shift from Proto Baz to Proto Kalenjin has been observed, though its explanation is noted as difficult.

Related Transformations

Spotted a mistake or have a better example?

EchoDrift is community-driven. You can suggest a change directly through GitHub.

Propose an Edit on GitHub