To find the correct synonym, we must look at the definition of the given word and compare it with the options provided.
The Word: Reluctant means feeling or showing hesitation, doubt, or a lack of desire to do something. If you are reluctant, you are not eager to act.
The Synonym: Unwilling means not ready, eager, or prepared to do something. Since both words describe a lack of enthusiasm or a refusal to act readily, they are synonyms.
Usage Example: "He was reluctant to admit his mistake" is the same as saying "He was unwilling to admit his mistake."