involution

noun

1. 1

   the action of enfolding something

2. 2

   the process of raising a quantity to some assigned power

3. 3

   the act of sharing in the activities of a group

   the teacher tried to increase his students' engagement in class activities

4. 4

   marked by elaborately complex detail

5. 5

   a long and intricate and complicated grammatical construction

6. 6

   reduction in size of an organ or part (as in the return of the uterus to normal size after childbirth)