(A) Object - to object means to be against something
(B) Obstruct - to obstruct means to stop someone
(C) Abject - abject means something which is completely without pride or dignity
(D) Abstract - means existing in thought or as an idea but not having a physical or concrete existence
Miserable means very unhappy or uncomfortable. From the given options the closest match is option (C) abject. Hence the answer is option (C)