故书gu shu

❶ancient book
❷old book

• insurrection
• intact
• intangible
• integument
• intelligible
• intemperate
• inter
• interaction
• intercede
• interdict
• interim
• interjection
• interlace
• interlock
• interlocutor
• interlope
• interlude
• intermediary
• interminable
• intermingle
• intermission
• intermittent
• intern
• internecine
• interplay