In speech, we often make language more efficient by dropping unnecessary syllables or squishing sounds together, even if it’s not writable. We truncate words without regard for spelling: you can say the first syllable of “usual” or “casual” and everyone knows what you mean, but do you write it “yooj”? “uzh”? “cazh”? “casj”? It’s simply not clear, but speech proceeds merrily along anyway.