To Nest

1. (intransitive, of animals) To build or settle into a nest.
2. (intransitive) To settle into a home.*
3. (intransitive) To successively neatly fit inside another.
4. (transitive) To place in, or as if in, a nest.
5. (transitive) To place one thing neatly inside another, and both inside yet another (and so on).
6. (intransitive) To hunt for birds' nests or their contents (usually "go nesting").