enclosed
adj.adj. surrounded by a fence, wall, or other boundary. It can also describe something put inside an envelope along with a letter.
adj. surrounded or closed off on all sides; alternatively, included within the same envelope or package as a primary document. Often functions as a participial adjective in formal correspondence.
The garden is an enclosed space where children can play safely.
Please find the signed contract enclosed with this letter for your records.
The property features an enclosed courtyard that provides a private sanctuary from the bustling city streets outside, effectively dampening the ambient noise of the surrounding traffic.
Commonly used in formal letters to refer to documents sent in the same envelope.
I have enclosed to this letterI have enclosed with this letterThe adjective or verb takes the preposition 'with' rather than 'to' when referring to accompanying items.