inside

On the inside.

“inside, the car is a mess”

In reality.

With respect to private feelings.

Within a building.

“in winter we play inside”

Relating to or being on the side closer to the center or within a defined space.

“he reached into his inside jacket pocket”

“inside out”

Confined to an exclusive group.

“inside information”

Away from the outer edge.

“the inside lane”

Being or applying to the inside of a building.

“an inside wall”

The inner or enclosed surface of something.

The region that is inside of something.