The Hebrew word commonly discussed for the Ark’s window or opening is tzohar.
Genesis 6:16 contains a difficult Hebrew term traditionally translated in several ways, including “window,” “light,” or “roof.” Many discussions transliterate it as tzohar. The passage instructs Noah to make the opening, finish the ark to a specified height, and place a door in its side, but the exact architectural meaning of the term remains debated.
Some interpretations understand tzohar as a window or opening that admitted light. Others connect it with a covering, roof feature, or luminous object. Translation traditions differ because the word occurs only rarely and its precise sense in this context is uncertain.
This is separate from the ark’s door, which Genesis explicitly locates in the side. It is also separate from the raven and dove passages, which describe how Noah tested the outside conditions. The safest answer is the transliterated Hebrew term, while recognizing that English Bibles do not all render it identically.