Lips
Spread your lips wide and tense, like a faint smile. Jaw nearly closed so the opening is a thin slit, teeth close together and just visible, as in the animation.
The vowel in "fleece". A long, tense "ee" with the tongue high and forward.
Example words: fleece, see, me, tea, green

Spread your lips wide and tense, like a faint smile. Jaw nearly closed so the opening is a thin slit, teeth close together and just visible, as in the animation.
Push the front of your tongue very high and far forward, close to the hard palate. You should feel real muscle tension.
Long. Hold it noticeably longer than the short "i": "sheep" stretches out, "ship" is clipped. Before voiceless sounds like "t" it shortens a little, but the tension stays.
Say "ee" while gently touching your cheeks: you should feel the muscles engaged. Then record "sheep, ship". If "sheep" doesn't sound clearly longer and brighter, add more smile and more hold.
The mirror image of the "kit" trap: if you relax too much, "sheep" collapses into "ship" and "leave" into "live". Length alone isn't enough. Without the tight tongue and spread lips, a long lax vowel still sounds wrong.
🔊 plays the app's native voice. 🎤 records you so you can play it back next to it. Your recording stays in your browser.