Ensconce (verb)

1. To establish securely or comfortably in a particular place or position.
2. To settle or establish oneself in a comfortable or secure position.

Origin:

From old french ensconcer, from en- "in" + esconse "hidden".

Examples:

1. The new government ensconced themselves in power.
2. He ensconced himself in the armchair and began reading.
3. The company ensconced itself in the market with their new product.
4. The family ensconced themselves in the new house.
5. He ensconced himself in the role of CEO.