Round your lips into a tight circle. Lift the back of your tongue toward the soft palate and add voice.

Americans pronounce whatever as wuh-TEH-ver (/wəˈtɛvər/). Stress falls on the second syllable — keep everything else short and quick. You'll hear it in sentences like "I am willing to do whatever it takes to repair our relationship".
Record yourself saying "whatever" and play it back. The mic stays on your device — nothing's uploaded.
3 syllables, 6 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 second syllable, not the others. Stretch TEH — 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.
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.