Final answer:
The opposite of 'penitent' is 'unrepentant', which means not feeling or showing regret for one's actions. The other options like 'misshapen', 'impending', and 'inexpensive' are not relevant to the context of remorse or regret.
Step-by-step explanation:
The question asks for the opposite of the word 'penitent' which means feeling or expressing remorse for one's misdeeds or sins. The options provided are 'misshapen', 'impending', 'inexpensive', and 'unrepentant'. The correct answer is 'unrepentant', meaning not feeling or showing regret for one's actions.
None of the other options provided align with the context of remorse or regret. 'Misshapen' pertains to a physical form that is not of the normal shape, 'impending' describes something that is about to happen, and 'inexpensive' refers to something that does not cost a lot of money. Thus, they are not suitable antonyms for 'penitent'.