v. Simple past tense and past participle of involute.
The Century Dictionary and Cyclopedia
Same as involute.
Having returned to the normal state: noting specifically the uterus after pregnancy.
Having undergone the retrograde processes peculiar to old age.
Word Usage
"The denouement of "Ghost-Writer" is, in fact, reminiscent of Somerset Maugham, a no-nonsense writer who had no use for James's involuted ambiguities."