In English:
* BEE-ah-tah (The stress is on the first syllable, with a long "e" sound and a short "a" sound.)
In Polish:
* BEH-ah-tah (The stress is on the first syllable, with a short "e" sound and a short "a" sound.)
In Italian:
* BEH-ah-tah (The stress is on the first syllable, with a short "e" sound and a short "a" sound.)
In Spanish:
* BEH-ah-tah (The stress is on the first syllable, with a short "e" sound and a short "a" sound.)
In other languages, the pronunciation might vary.
To be sure of the correct pronunciation, it's always best to check the context or ask a native speaker.