Inside - situated within or ideal for within a making; "an interior scene"; "interior decoration"; "an inside rest room without windows" four. The adverb indoors must be used to modify the verb keep. Indoor is definitely an adjective and can be used in different ways, for instance in indoor locations. Examples are https://indoor-door-mats56667.ageeksblog.com/36445550/detailed-notes-on-indoor-mats