gymnasium
noun /dʒɪmˈneɪziəm/
  /dʒɪmˈneɪziəm/
 (plural gymnasiums, gymnasia 
 (formal) /dʒɪmˈneɪziə/
  /dʒɪmˈneɪziə/
)- a gymTopics Educationc1, Health and Fitnessc1Word Originlate 16th cent.: via Latin from Greek gumnasion, from gumnazein ‘exercise naked’, from gumnos ‘naked’.