'baseball-club' originates from English, specifically the compound words 'baseball' and 'club'. 'baseball' itself is formed from 'base' + 'ball' (the game's bases and the ball used), and 'club' comes from Old English 'clubb'.

'baseball' developed in 19th-century American English as the name of the sport; 'club' came from Old English 'clubb' meaning 'a cudgel' and later extended to mean 'a group or association'. The compound 'baseball club' arose as organized teams and associations formed around the sport and eventually became the standard term for such teams.

Initially, 'clubb' meant 'a cudgel' in Old English, but over time 'club' evolved to mean 'an association or group'; 'baseball' has consistently referred to the sport since the 19th century, and 'baseball-club' has meant 'a team or organized group for baseball'.