catalactics[kætəˈlæktiks]

n. 交易学

• undertake
• undertaker
• undertax
• underthings
• undertint
• undertone
• underutilization
• undervalue
• undervalued
• undervest
• underwaist
• underwater
• underwater sound
• underway
• underwear
• underwing moth
• underworld
• underwrit
• underwrite
• underwriting
• undeserved
• undeserver
• undesirable
• undetermined
• undeterred