õ, ä, ö, ü: the four vowels that give you away

Estonian has nine vowels, and four of them - õ, ä, ö, ü - do not exist in English or Russian. Getting them wrong rarely blocks understanding, but getting them right transforms how natural you sound. Here is how to build each one.
õ - the hardest one
There is no shortcut: õ is a mid back unrounded vowel. Say "uh" as in English "sofa", but pull your tongue back and do NOT round your lips.
Drill pair: kõrv (ear) vs korv (basket). If a listener hears the difference, your õ works.
ä - open your jaw
Like the a in English "cat", but more open. The mistake is making it too close to e.
Drill pair: säng (bed) vs seng (not a word - if your ä drifts to e, you will hear it).
ö - round your lips on e
Say Estonian e, then round your lips without moving your tongue. German ö and Russian ё (without the y-glide) are close cousins.
Drill pair: köök (kitchen) vs kook (cake). Order dessert wrong once and you will never forget this pair.
ü - round your lips on i
Say i, round your lips. French u, German ü.
Drill pair: üks (one) vs uks (door). "One coffee" and "door coffee" are different orders.
The method
- Record yourself saying the drill pairs.
- Compare against the lesson audio (the narration voice says every vocab word).
- Five minutes a day beats one hour a week - mouth muscles learn like gym muscles.
A2est scores your pronunciation on every speaking exercise and tells you which syllable drifted, so you always know which of these four to drill next.