I put the letter in the envelope.

She carefully enveloped the gift in colorful wrapping paper.

The envelopment of the gift made it look even more special.

I received my pay envelope today.

In her pursuit of groundbreaking scientific discoveries, Dr. Anderson always strives to push the envelope, fearlessly venturing into uncharted territories.

The military strategy of enveloping fire was used to surround the enemy.

I received a letter in a window envelope.

Please enclose a self-addressed envelope with your letter.