BRIGHTEN
VERBS
1400 ► SHEER to make bright or pure → obs.
1490 ► ILLUSTRE to brighten; to light up → obs.
1508 ► ILLUMINE to brighten as with light; to make radiant
1586 ► UPCHEER to brighten; to enliven; to cheer up; encourage → obs.
1592 ► ILLUSTRATE to make bright, lustrous, or luminous; to set off with bright colours → obs.
1602 ► ILLUME to make bright or shining; to light up
1623 ► RUTILATE to appear bright; to shine, to glitter; to emit rays of light → obs.
1823 ► SPURK to brighten or cheer up; said of persons → Eng. dial.
1828 ► LEAR UP to brighten up → Sc.
1866 ► KECKLE-UP to brighten or perk up; to recover from illness or sadness → Sc.
Lexicophilia 