contortion

Noun

• a tortuous and twisted shape or position
  • they built a tree house in the tortuosities of its boughs
    
  • the acrobat performed incredible contortions
    

• the act of twisting or deforming the shape of something (e.g., yourself)

Related words

• Synonyms: 
  tortuosity , tortuousness , torsion , crookedness , deformation