Hi<br/><br/>I heard <b><i>nefarious activities</i></b> in a film today. The policeman said something like this.<br/><br/>(during casual conversation)<br/><br/>All these <b>nefarious activities</b> must be stopped. <br/><br/>Would you as a native speaker find this odd ? I mean the use of such a formal word in casual conversation?<br/><br/>Thanks,<br/><br/>Tom