risk B1

/ɹɪsk/ The chance that something bad might happen.

moonlight B2

/ˈmunˌlaɪt/ The light of the moon.

lackluster C1

/ˈlæklʌstə(ɹ)/ Not impressive; dull and lacking energy or excitement.

luster C2+

/ˈlʌstɚ/ a gentle sheen or radiant glow

elucidate C2+

/ɪˈlusɪdeɪt/ to make something clear by explanation

illumine C2+

/ɪˈlumɪn/ to light up or enlighten, literally or spiritually

lucid C2+

/ˈlusɪd/ clearly expressed and easy to understand; clear-minded

luminous C2+

/ˈlumɪnəs/ giving off or full of light; radiant

lunacy C2+

/ˈlunəsi/ foolish or reckless behavior; insanity

luminary C2+

/ˈlumɪˌnɛri/ a person of prominence or brilliance in a field; a celestial light