Answer: See explanation
Explanation:
1. Shockingly, the serial killer would (dismember) his victims hand and legs.
Dismember men's to cut off some parts of ones body.
2. The victim was (cunningly) concealed in the floorboards of th house.
3. The marathon runner reported having an (acute) pain in his chest.
4. I cannot (conceive) that he would wish to do is harm.
Conceive here means to believe.
5. The spy mastered the art of (dissimulation) by pretending to be someone else.
Dissimulation means to concealment ones identity or pretend to be someone else.
