1. obstruent - Noun
2. obstruent - Adjective
Causing obstruction; blocking up; hindering; as, an obstruent medicine.
Anything that obstructs or closes a passage; esp., that which obstructs natural passages in the body; as, a medicine which acts as an obstruent.
Source: Webster's dictionaryIn many such languages, obstruents are realized as voiced in voiced environments, such as between vowels or between a vowel and a nasal, and voiceless elsewhere, such as at the beginning or end of the word or next to another obstruent. Source: Internet
In North America, a majority of languages do not have rhotics at all and there is a wide variety of lateral sounds though most are obstruent laterals rather than liquids. Source: Internet