sem·tex
noun/ˈsemteks/
/ˈsemteks/
[uncountable]- a powerful explosive that is used for making bombs, often illegally
塞姆汀塑胶炸药（常用于非法制造炸弹） Word Origin1980s: probably a blend of Semtin (the name of a village in the Czech Republic near the place of production) and explosive.