obstruent

adj

1. Causing obstruction; blocking up.

   “an obstruent medicine”

noun

1. A consonant sound formed by obstructing the airway, causing turbulence; a plosive, fricative, or affricate.

   “Lehmann (1998:77) and Steever (1998: 14, 16) considered āytam an allophone of Tamil /y/ before obstruents, but there is no real evidence for this assumption.”

2. Anything that obstructs, especially in the passages of the body.