Dovetail

The word Dovetail, so often used by Srila Prabhuapada to describe how our material activities should be related to our spiritual life, was originally used to describe a type joint between two piece of wood.

The idea is that by cutting the two pieces of wood in such a way that they interlock they become so strongly connected that nothing can separate them, they are like one piece of wood.

Eventually the word came to have meaning outside of carpentry, here are few definitions

"To fit in or connect strongly, skillfully, or nicely; to fit ingeniously or complexly."
"To combine or interlock into a unified whole"
"to join or fit together compactly or harmoniously."

Our consciousness and all our activities must be dovetailed with the Supreme, it must be so interlocked that it becomes a unified whole with the Supreme, in perfect harmony with the will of the Supreme.

"The individual consciousness is advised to dovetail with the supreme consciousness, as instructed by the Lord in Bhagavad-gita. The individual consciousness (Arjuna) is advised to dovetail with the supreme consciousness and thus maintain his conscious purity. It is foolish to try to stop the activities of consciousness, but they can be purified when they are dovetailed with the Supreme."

"Pure devotees are not desirous of any material enjoyment, nor are they averse to it. They completely dovetail their desires with the desires of the Lord and perform nothing on their personal account."