Press your lips together to stop the air, then release. No vocal cord vibration.

Americans pronounce passes as PA-suhz (/ˈpæsəz/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "The clam filters food from the water as it passes by".
Record yourself saying "passes" and play it back. The mic stays on your device — nothing's uploaded.
2 syllables, 5 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
The textbook way isn't wrong — it's just not how anyone actually says it.
Stress falls on the first syllable, not the others. Stretch PA — keep everything else short and quick.
Don't pronounce the first syllable too fully. The unstressed syllable reduces to a schwa — the lazy "uh" sound — in casual speech.