inside
in-side
preposition
Within the inner part or boundaries of a place, object, or container.
"The cat is inside the box."
noun
The inner part or surface of something, often a building or object.
"The inside of the house was warm."
adverb
To or in the inner part of a place, building, or container.
"It's cold, let's go inside."
adjective
Located on, relating to, or coming from the inner part of something.
"He had inside knowledge of the deal."
Thesaurus
Synonyms: in spite of appearance, at heart, at bottom, deep down, inwardly, within, interior, exclusive, inner, privileged, wrong, indoors
Antonyms: alfresco, exterior, out of doors, outdoors, outside, outwardly