Brighten

To add light, color, or visual freshness to something.

Reach for it when describing a change that makes a place or object more luminous

Pale curtains brighten the narrow room without hiding the old brick.

• everyday

  lighten

  a shade, load, or mood becomes less heavy

  not when added cheer rather than reduced darkness is central

• professional

  enliven

  color or activity adds energy

  not when literal light is the mechanism

• formal

  illuminate

  actual light makes something visible

  not when color or emotional warmth creates the effect

To make someone or a situation feel more cheerful or hopeful.

Reach for it when praising a small action that improves emotional atmosphere

A handwritten message can brighten a difficult morning.

• playful

  perk up

  a quick informal rise in energy fits

  not when lasting hope or dignified support should be conveyed

• everyday

  lift

  mood rises after strain

  not when a vivid positive change rather than relief is intended

• warm

  cheer

  someone's spirits directly improve

  not when the object is a room or visual design

• literary

  gladden

  something brings heartfelt pleasure

  not when a natural contemporary tone is wanted

• darken
• dim
• sadden

• brighten a room

  One clean mirror can brighten a room with little natural light.

• brighten someone's day

  A remembered name may brighten someone's day more than elaborate praise.

• brighten the mood

  The children's questions helped brighten the mood after the delay.