Frequency: The word is one of the 3000 most common words in English.
1.
The ~ parts of something are the parts which are contained or are enclosed inside the other parts, and which are closest to the centre.
Wade stepped inside and closed the ~ door behind him.
? outer
ADJ: ADJ n
2.
Your ~ feelings are feelings which you have but do not show to other people.
Loving relationships will give a child an ~ sense of security...
ADJ: ADJ n