I. ˈäbztrəwənt -bst- adjective
Etymology: Latin obstruent-, obstruens, present participle of obstruere to obstruct — more at obstruct
1. archaic : causing obstruction : blocking up
2. phonetics : characterized by stoppage or friction
II. noun
( -s )
: a speech sound in the articulation of which the breath passage is obstructed completely or to the point of producing friction : stop , fricative — compare resonant