1) Hindrance 
• (n.) The act of filling or crowding together; a stopping by redundant matter; obstruction, particularly in the lower intestines.
Obstruction or closing of the pores. ... Origin: L. Oppilatio, fr. Op-pilo (obp-), pp. -atus, to stop up, fr. Pilo, to ram down ... (05 Mar 2000) ... 
Op`pi·la'tion noun [ Latin oppilatio : confer French opilation .] The act of filling or crowding together; a stopping by redundant matter; obstruction, particularly in the lower intestines. Jer. Taylor.