/ɑ/

The /ɑ/ is the most open back vowel in American English. Here's how to make it:

1. Open your jaw wide - this vowel requires the widest jaw opening of any English sound. Think of saying "ahhh" at the doctor's office.

2. Position your tongue low and back in your mouth. The tip should rest gently behind your lower front teeth.

3. Push the back of your tongue down slightly. You may feel a bit of tension in the back of your tongue as it lowers.

4. Keep your lips relaxed and unrounded - they should be neutral, not pursed.

This vowel appears in various spellings:

• "o": hot, lot, stop, not, got, clock
• "a": father, spa, drama, wander, calm, palm
• "a" before "r": car, start, farm, march (part of the r-colored vowel)

In much of Western and Midwestern American English, speakers pronounce "cot" and "caught" identically - both with /ɑ/. If you're from these regions, words like "lot" and "thought" sound the same.

However, in Eastern New England, New York City, and parts of the South, speakers maintain a distinction between /ɑ/ (cot) and /ɔ/ (caught). Neither pronunciation is more "correct" - it depends on which regional accent you're learning.

Compare /ɑ/ to /ʌ/: The words "not" and "nut" differ only in this vowel. For /ɑ/, your jaw drops much lower and your tongue moves further back. Practice the minimal pairs: lock/luck, shot/shut, cot/cut.