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

Americans pronounce powered as POW-erd (/ˈpaʊərd/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "He observed the cells under a high-powered microscope".
Record yourself saying "powered" and play it back. The mic stays on your device — nothing's uploaded.
2 syllables, 4 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.
In "powered", the "d" is not released — the articulators get into position but hold without the burst of air. Air stops but there's no release burst — the articulators hold position.
Stress falls on the first syllable, not the others. Stretch POW — keep everything else short and quick.
Americans use a relaxed retroflex R — the tongue curls back rather than rolling. The R is one continuous sound with the vowel before it, not two separate sounds.