Passion can be a vital key to success.

"Insects are a vital key for us," he explains.

While not initially usable in missions, she becomes a prominent member of the team and a vital key to victory.

Remembrance is a vital key to the prevention of future abuse.

Sepehri's vision has been a vital key to his success.

His father's estates were a vital key in my master's plans.

This meant he held a vital key that the others didn't even know existed.

The vital key here is the delete key on the keyboard.

To his keen mind that trifling clue was the vital key to crime!

However, social and economic development is the vital key to peace and coexistence.