Sentence:  <WSD>inner</WSD> door;  <WSD>inner</WSD> room;  <WSD>inner</WSD> sanctum;  <WSD>inner</WSD> surface 
Meaning of the word marked with <WSD> tags:  Being or occurring (farther) inside, situated farther in, located (situated) or happening on the inside of something, situated within or farther within contained within something.