Most people pronounce Taekwondo incorrectly which drives the humble martial artist insane! Let's get this right and correct the rest of the World! Even Olympians, representing our beautiful martial art on a worldwide stage can't pronounce it.
Most people say the first syllable as TIE when in actual fact it's pronounced TAY. Tie indicates that Taekwondo originates from Thailand as opposed to South Korea.
If you want conclusive evidence of how to pronounce our martial art listen to any Korean Taekwondo Master and see how they say it. I guarantee it won't be like the majority of practitioners.