1) Barricado 2) Congest 3) Occlude 1) Block 2) Block passage through 3) Close up 4) Hinder 5) Impede 6) Obstruct 7) Occlude 8) To block up or obstruct 
Obturation is the process of a bullet expanding under pressure to fit the bore of the firearm, or a cartridge case expanding under pressure to seal the chamber. See also swage.
to stop up; to seal up
• (v. t.) to stop (a gun breech) so as to prevent the escape of gas in firing. • (v. t.) To stop or close, as an opening;
With reference to endodontics, refers to the sealing of the canal(s) of tooth roots during root canal therapy procedure with an appropriately prescribed material such as gutta percha in combination with a suitable luting agent.
Ob'tu·rate transitive verb [ imperfect & past participle Obturated ; present participle & verbal noun Obturating .] [ Latin obturatus ; p.p. of obturare .] To stop or close, as an opening; specif., (Ordnance) , to s...