luminosity：光明，光辉；发光度；发光体

词根词缀： -lumin-光,照 + -osity名词词尾

• commemorative
• commence
• commencement
• commend
• commendatory
• commensal
• commensurable
• commensurate
• comment
• commentary
• commentate
• commentator
• commerce
• commercial
• commercialism
• commercialist
• commercialize
• commingle
• commiserate
• commissar
• commissariat
• commissary
• commission
• commit
• commitment