Raise the back of your tongue to touch the soft palate (velum). Stop the air, then release.

Americans pronounce capable as KAY-puh-buhl (/ˈkeɪpəbəl/). The L in "capable" is a dark L — the back of the tongue rises toward the soft palate, adding a small "uh" quality before the L. This is called the Dark L vs Light L, a hallmark of natural-sounding American speech. It comes out as KAY·puh·buhl. Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "He is a very strong and capable leader".
Record yourself saying "capable" and play it back. The mic stays on your device — nothing's uploaded.
3 syllables, 7 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.
The L in "capable" is a dark L — the back of the tongue rises toward the soft palate, adding a small "uh" quality before the L. Dark L adds a small schwa-like "uh" before the L. The back of the tongue lifts toward the soft palate.
Stress falls on the first syllable, not the others. Stretch KAY — 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.