lus·ter (US) or Brit lus·tre 
/ˈlʌstɚ/ noun
/ˈlʌstɚ/ noun [singular] 1 : the shiny quality of a surface that reflects light
▪ the luster of polished metal ▪ He polished the silverware for hours trying to restore its luster. ▪ the luster of her eyes 2 : an appealing, exciting, or admired quality
▪ The trip loses some of its luster [=it becomes less appealing or exciting] after you've done it several times. ▪ The scandals have tarnished/dimmed his luster. [=damaged his reputation] ▪ the luster [=renown] of the family's name
▪ the luster of polished metal ▪ He polished the silverware for hours trying to restore its luster. ▪ the luster of her eyes
▪ The trip loses some of its luster [=it becomes less appealing or exciting] after you've done it several times. ▪ The scandals have tarnished/dimmed his luster. [=damaged his reputation] ▪ the luster [=renown] of the family's name
— lus·ter·less (US) or Brit lus·tre·less adjective
▪ dull lusterless eyes ▪ lusterless silverware
▪ dull lusterless eyes ▪ lusterless silverware
— lus·trous /ˈlʌstrəs/ adjective [more lustrous; most lustrous]
▪ lustrous silk ▪ a lustrous [=shining] surface
/ˈlʌstrəs/ adjective [more lustrous; most lustrous] ▪ lustrous silk ▪ a lustrous [=shining] surface
