ズボン
ズボン · zubon · JLPT N5 · noun
trousers
👖 From French jupon (petticoat): legwear borrowed, meaning shifted to trousers
ズボン is a loanword, which is why it is written in katakana. It is usually traced to French jupon, an underskirt, borrowed in the 19th century and reapplied to Western-style trousers. Sound hook: zubon, the legs go zu-BON into each trouser leg.