Deserving respect, especially due to age or character.
For example: The old woman was the most venerable person in the village due to her wisdom.
Vent has two meanings.
1. With reference to a Volcano or any space:
It is a small opening which allows air, smoke or any liquid to enter or leave a a closed space.
The main vent of Mauna Loa volcano is very active.
2. In the case of emotions:
To express a negative emotion in a forceful and unfair way.
Shouting and becoming angry is not a good way to vent your frustration.