Definition of spirantize in English:

spirantize

transitive verb

(also British spirantise)
[with object]Phonetics
  • Pronounce (a consonant) with a continuous expulsion of breath.

    • ‘intervocalic voiced stops are generally spirantized’

Pronunciation

spirantize

/ˈspīrənˌtīz/ /ˈspaɪrənˌtaɪz/

Origin

Early 20th century from spirant + -ize.