depression：(心情)抑郁；(经济)萧条  

词根词缀：de-向下 + -press-压 + -ion名词词尾

• uproot
• upsell
• upset
• upshot
• upside
• upside-down
• upsilon
• upskill
• upstart
• upstate
• upstream
• upsurge
• upswell
• upsy-daisy
• uptake
• uptempo
• upthrust
• uptick
• uptight
• uptown
• upward
• upwind
• uran-
• uranium
• Uranus