Explanation
Spirantisation is used here in the narrow sense of a change or alternation in which a sound becomes a fricative, often from a stop: complete closure gives way to a constriction producing friction. Some traditions also use the term for processes whose outputs are approximants or other frictionless continuants, so the actual realisation must be specified. Within lenition, fricativisation is one possible process rather than a definition of all weakening. Environment, speaking style and linguistic status must be examined separately: a phonetic variant is not automatically a historical sound change or a new phoneme. Calling a process weakening depends on the relevant analysis, not on a general judgement about pronunciation quality.
Movement of thought
1. Identify the source sound. 2. Compare closure and friction. 3. Record environments. 4. Check the variant's status. 5. Distinguish change from alternation.
Scientific use case
Acoustic and historical data can be compared to investigate conditions on fricativisation.
Example
The schematic development [t] → [θ] replaces closure with a fricative constriction; it illustrates a process without claiming evidence from a particular language.
Counterexample
A change from [t] to a tap would not thereby be spirantisation.
Distinction
Distinguish spirantisation from lenition in general, voicing alone and deletion.
Effect on thought and perception
The term specifies a particular change in manner of articulation.
Resonance
An interruption of airflow becomes an audible passage.
Provenance
Parallel corpus 98f0950771ae4662f291d2f15f5c51b6797f3c20ba458a68615cdb177002ea18; case-bounded source review accepted; human specialist review not claimed.
Cite this entry
Reich, Michael (Hrsg./ed.): „Spirantisation“. Atlas der Sprache, AT-NAV-G05-009. ATLAS 259, data model 1.6.0. https://atlasoflanguage.com/concept/AT-NAV-G05-009The address remains stable; editorial content may evolve. Editorial reading state: 2026-10-15. Include your access date for precise references.