Hamper, impede (8)
I believe the answer is:
encumber
I believe this is a double definition.
'hamper' is the first definition.
(thesaurus)
'impede' is the second definition.
(I've seen this before)
(Other definitions for encumber that I've seen before include "Be a burden to, hamper" , "Be a burden to, place load on" , "Restrict or impede" , "Saddle" , "Impede, burden" .)