1ta·boo 
/təˈbu:/ adjective
/təˈbu:/ adjective [more taboo; most taboo] : not acceptable to talk about or do
▪ Sex is a taboo subject for many people. ▪ In this company, dating a coworker is considered taboo.
▪ Sex is a taboo subject for many people. ▪ In this company, dating a coworker is considered taboo.
