involution involution /ˌɪnvəˈluːʃən/

noun

1. The action of enfolding something  ( enfolding , involution )
   the action of enfolding something
   
2. [Archaic] The process of raising a quantity to some assigned power  ( exponentiation , involution [Archaic] )
   the process of raising a quantity to some assigned power
   
   
3. The act of sharing in the activities of a group  ( engagement , involution , involvement , participation )
   the act of sharing in the activities of a group
    The teacher tried to increase his students' engagement in class activities
   the teacher tried to increase his students' engagement in class activities
   
4. Marked by elaborately complex detail  ( elaborateness , elaboration , intricacy , involution )
   marked by elaborately complex detail
   
5. A long and intricate and complicated grammatical construction  ( involution )
   a long and intricate and complicated grammatical construction
   
6. Reduction in size of an organ or part (as in the return of the uterus to normal size after childbirth)  ( involution )
   reduction in size of an organ or part (as in the return of the uterus to normal size after childbirth)
   

 osteoma osteoma /ɒstiˈoʊmə/

noun

1. A slow growing benign tumor of consisting of bone tissue; usually on the skull or mandible  ( osteoma )
   a slow growing benign tumor of consisting of bone tissue; usually on the skull or mandible
    The radiologist identified an osteoma on the patient's X-ray.
   The radiologist identified an osteoma on the patient's X-ray.
   
   

 emaciation emaciation /ɪˌmeɪsiˈeɪʃən/

noun

1. Extreme leanness (usually caused by starvation or disease)  ( boniness , bonyness , emaciation , gauntness , maceration )
   extreme leanness (usually caused by starvation or disease)
   
   

 humbug humbug /ˈhʌmˌbəg/

noun

1. Something intended to deceive; deliberate trickery intended to gain an advantage  ( dupery , fraudulence , hoax , fraud , humbug , put-on [Informal, N. American] )
   something intended to deceive; deliberate trickery intended to gain an advantage
    The businessman was arrested for committing a major financial fraud.
   The businessman was arrested for committing a major financial fraud.
   
   
2. Communication (written or spoken) intended to deceive  ( humbug , snake oil )
   communication (written or spoken) intended to deceive
   
3. Pretentious or silly talk or writing  ( baloney [Informal] , bilgewater [Informal] , boloney [Informal] , bosh [Informal] , drool , humbug , taradiddle [Informal] , tarradiddle [Informal] , tommyrot [Informal] , tosh [Informal, British] , twaddle [Informal] )
   pretentious or silly talk or writing
   

verb

1. Trick or deceive  ( humbug )
   trick or deceive