A vowel with no mark over it is a short vowel.
When a vowel has no diacritical marks, it usually represents its shortest sound. This is true in most languages that use diacritics, including English, French, Spanish, and German.
A vowel with no mark over it is pronounced with a short sound. When a vowel appears without any diacritical marks, it is typically pronounced with a short sound.
For example, the letter "a" without any marks is pronounced as "ah" in the word "cat" or "bat." Similarly, the letter "e" without any marks is pronounced as "eh" in the word "pen" or "met.
Complete question:
Meaning: A vowel with no mark over it is