Diction is how you speak your words. Even if you have a strong accentA distinctive way of pronouncing a language. you can be understood clearly when you take your time to articulate your vowels and consonants clearly. Make sure your vowels (A, E, I, O, U) are sounded and shaped and be sure to pronounce each of your consonants – but do this naturally and expressively.
It might feel unnatural to do this at first and it won’t be quite the way you speak in everyday conversation; but if you’re in a formal situation, or delivering a presentation, clear diction will help make sure your message is understood.
Actor Adrian Lester demonstrates some exercises to improve your diction