[l]→[t]Certainty: 1/5Commonality: 1/5

Alveolar lateral approximant to Voiceless alveolar plosive

The shift from the lateral approximant [l] to the voiceless alveolar stop [t] is a form of fortition (consonant strengthening), moving from a sonorant to an obstruent within the same alveolar place of articulation. Because it involves an increase in constriction and the loss of laterality, it runs counter to the dominant direction of historical change (which more commonly sees stops weaken to approximants or laterals). As a regular, unconditioned sound law, l > t is essentially unattested across the world's languages. The most consistent evidence comes from developmental phonology, where 'stopping' of liquids — replacing [l] or [r] with [t] or [d] — is a widespread and well-documented process in children aged roughly 2–3. In historical linguistics, the direction of change is strongly skewed the other way (t > l, lenition), making l > t a typologically marked and very rare shift.

Phonetic Effects

Fortition, Stopping, Desonorization

Language Examples

Child Phonology Universal

lamp [l]→[tæmp]— Developmental stopping: replacing laterals with alveolar stops during early language acquisition. Documented as a typical phonological process in children; resolves by approximately age 3.

look→took

Related Transformations

Reverse

More Fortition Shifts

[j] → [dʒ] — Fortition [j] → [dʑ] — Fortition [j] → [z] — Fortition [j] → [ʑ] — Fortition [s] → [k] — Retraction

Sources & References

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