obstruent /ˈɒbstɹuːənt/noun 2adjective 1forms 3 noun2 •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. — 2003 •Anything that obstructs, especially in the passages of the body. adjective1 •Causing obstruction; blocking up. formsobstruents · more obstruent · most obstruent