Postby ling » 2015-03-06, 6:54
They're borrowed into English from Greek. But the rules of English phonotactics do not allow initial pt-, ps-, or pn- sounds, so the p is rendered silent.
Native: [flag=]en[/flag] Advanced: [flag=]zh[/flag] Actively studying: [flag=]th[/flag][flag=]id[/flag] Passively dabbling: [flag=]lkt[/flag]