Pronunciation of English ⟨a⟩
There are a variety of pronunciations in Modern English and in historical forms of the language for words spelled with the letter ⟨a⟩. Most of these go back to the low vowel (the "short A") of earlier Middle English, which later developed both long and short forms.
Source: Wikipedia — Pronunciation of English ⟨a⟩ (CC BY-SA 4.0)