marigraph：(记录潮汐的)自动记潮仪 

词根词缀： -mar-海 + -i- + -graph-写,画

• government
• governor
• gown
• goy
• grab
• grace
• graceful
• gracious
• gradation
• grade
• grader
• gradient
• gradine
• gradual
• gradually
• graduate
• graduation
• graduator
• graffiti
• graft
• graham
• graham cracker
• grail
• grain
• grained