ENCLOSE

Completely surround

• Box in

• Cocoon

• Corral

• Fence in

• Fence off

• Frame

• Hem in

• Include in the envelope

• Include, in a way

• Pen

• Place in an envelope

• Put a fence around

• Put in the envelope

• Put in, as with a letter

• Ring

• Stuff envelopes

• Stuff into an envelope

• Surround

• Surround completely

• Wall in

• Wall off