ratiocination
🇺🇸
/ˌreɪʃiˌəʊsɪˈneɪʃn/
🇬🇧
/ˌrætiˌɒsɪˈneɪʃn/
the act of using reason to understand or explain something
Her ratiocination allowed her to solve the complex puzzle.
她的推理能力讓她解開了複雜的謎題。