involution (n.)

• absorption
• addition
• ambages
• approximation
• circumlocution
• circumvolution
• comedown
• complexity
• complexness
• complication
• convolution
• crabbedness
• crinkle
• debasement
• decadence
• decadency
• declension
• declination
• decline
• deformation
• degeneracy
• degeneration
• degradation
• demotion
• depravation
• depreciation
• derogation
• descent
• deterioration
• devolution
• differentiation
• division
• downturn
• drop
• dying
• ebb
• embarrassment
• engagement
• entanglement
• equation
• evolution
• extrapolation
• fading
• failing
• failure
• fall
• implication
• inclusion
• integration
• interpolation
• intricacy
• inversion
• involvement
• lapse
• meander
• multiplication
• notation
• perplexity
• practice
• proportion
• ramification
• reduction
• regression
• relation
• retrogression
• sinuation
• sinuosity
• sinuousness
• slippage
• slump
• subtlety
• subtraction
• tanglement
• technicality
• torsion
• tortuosity
• tortuousness
• transformation
• turning
• twisting
• undulation
• wane
• wave
• waving
• winding