hide, put away
If you ensconce yourself somewhere, you put yourself into a comfortable place or safe position and have no intention of moving or leaving for quite some time.
Recondite areas of knowledge are those that are very difficult to understand and/or are not known by many people.
When you abscond, you leave suddenly from a place that has imprisoned or persecuted you, or you leave from a place with something that doesn't belong to you.
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