Language is complicated. Not only are there numerous ways to spell the same word, but there are hushed letters, accent on certain syllables, and basically a bunch of ways to say common everyday words wrong.
After all, the whole thing sounds right in your head until you say it aloud and everyone looks at you funny. For example, Envelop is pronounced as ' on-ve-lop' as it is a word taken from French, but many times we end up pronouncing it wrong.
Hopefully, this will help you at least a little bit.