Let’s look at a Hebrew word for this one. A rather well-know word would be shalom meaning peace. It is also commonly used as a greeting.

In Hebrew characters only, the word appears as follows . . .

שלום

If vowel markings are added, shalom takes on the following appearance . . .

שָׁלוֹם

The dot above the shin (the w looking character to the right) is not a vowel marker but the others are vowels.

Remember! Hebrew is read right to left. It is that w looking character that provides the sh sound to shalom.