" involution "

[Noun]  | "in*vo*lu*tion" | \ ˌin-və-ˈlü-shən \

1: the act or an instance of enfolding or entangling : involvement

2: an involved grammatical construction usually characterized by the insertion of clauses between the subject and predicate

3: complexity, intricacy

Origin: circa 1611 ;

 Middle English involucioun "wrapping of a bandage, twist or coil of an organ, anatomical fold or entanglement," borrowed from Middle French & Medieval Latin; Middle French involucion "state of something rolled up on itself, confusion, complications hindering the prosecution of a lawsuit," borrowed from Medieval Latin involūtiōn-, involūtiō "twist or coil of an organ, covering, wrapping up, envelopment, complexity, obscurity," going back to Latin, "a spiral, screw," from involū-, variant stem of involvere "to move by rolling, roll back on itself, enclose in a covering, wrap up" (Medieval Latin, "to engage in an affair or occupation, implicate, ensnare") + -tiōn-, -tiō, suffix of verbal action {mat|involve|};

[Noun]  | "ex*po*nen*ti*a*tion" | \ ˌek-spə-ˌnen(t)-shē-ˈā-shən \

1: the mathematical operation of raising a quantity to a power —called also involution

Origin: 1903 ;

[Noun]  | "involution"