Here are some examples:
* "Samahani" (Sorry) - The "S" here is very similar to the English "S".
* "Sisi" (We) - The "S" here has a slightly more forward tongue placement than the English "S", but it's not dramatically different.
* "Sawa" (Okay) - The "S" here has a more noticeable forward tongue placement, but it's still quite close to the English "S".
To get a better understanding, you can listen to Swahili speakers pronounce words with "S" sounds. There are many resources online, such as Swahili language learning websites or YouTube videos.