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to lighten up

to lighten up

111 4.1
To become or make someone feel more cheerful and relaxed
  • phrasal verb
  • /ˈlaɪtən ʌp/
  • Informal
: relajarse
  • Everyone should lighten up a bit; life is too short to be serious all the time.
  • Hey, lighten up
  • lighten up a bit
  • Oh, lighten up

It just means learning how to lighten up.

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Examples

  • So don’t you think it’s time for you to lighten up and start having more fun?

    Blog text (7)
  • " You need to lighten up, boy; have yourself some fun.

    Fiction book (1994)
  • All right, can you lighten up a little bit?

  • You have got to lighten up.

  • Okay, everybody, just lighten up.

  • I think people need to lighten up when it comes to sex.

    Blog text (25)
  • You need to lighten up, Shadow.

  • Well, those people need to lighten up and grow a sense of humor.

    Blog text (27)
  • - You've gotta lighten up.

  • "Will you just lighten up?" she hissed, standing on tiptoe to speak into his ear.

    Fiction book (1994)

Synonyms

to cheer
vsto lighten up
248 1.0

To make someone feel happier

adds a calming effect and reduces seriousness
to cheer up
vsto lighten up
  • Informal
236 1.4

To feel happier after being sad or to make someone feel happier

is broader, including both cheerfulness and relaxed, less serious tone
to lighten
vsto lighten up
125 3.4

To make people or a situation feel more cheerful

adds a clearer sense of becoming relaxed as well as cheerful
to loosen up
vsto lighten up
  • Informal
86 3.4

To relax and become less nervous or tense

is more about increasing cheerfulness rather than only relaxing
to make someone smile
vsto lighten up
85 1.0

Cause someone to feel happy or amused

is broader, adding relaxed, less serious mood change
to brighten
vsto lighten up
71 2.7

To make a place or thing look more cheerful by adding color

applies mood change to people and includes relaxation too
to uplift
vsto lighten up
64 3.2

To make someone feel happier and more hopeful

stresses becoming more relaxed and less serious in mood
to light up
vsto lighten up
  • Informal
55 3.7

Become lively and cheerful because someone is there

is more personal, stressing relaxed and less serious mood
to mellow
vsto lighten up
35 4.0

To become or make something softer, gentler, and more pleasant

leans more toward making someone cheerful and less serious
to perk up
vsto lighten up
  • Informal
31 3.1

Become more lively and cheerful after feeling tired or sad

leans more toward calming and reducing seriousness than high energy
to buck up
vsto lighten up
  • Informal
25 6.3

To become or make someone more cheerful and confident

focuses more on reducing seriousness and becoming relaxed
to brighten up
vsto lighten up
  • Informal
22 2.7

Make a room or person more cheerful

puts slightly more weight on also becoming relaxed and less serious
to mellow out
vsto lighten up
  • Informal
22 6.3

Become more relaxed and easygoing

is more about adding cheerfulness and lightening seriousness
to liven up
vsto lighten up
  • Informal
19 3.9

To make or become more active and interesting

is more about easing seriousness and creating a relaxed mood
to lift someone's spirits
vsto lighten up
17 3.9

To make someone feel happier when they are sad

also suggests a gentler shift toward relaxation and less seriousness
to enliven
vsto lighten up
8 4.1

Make something more active and interesting

focuses more on softening mood and reducing seriousness
to raise someone's spirits
vsto lighten up
6 3.4

Help someone feel happier

adds the idea of becoming calmer and less serious while cheering
to pep up
vsto lighten up
  • Informal
3 4.1

Make someone or something more lively and interesting

is softer, focusing more on easing seriousness than on energy
to buoy up
vsto lighten up
1 5.3

To make someone feel more cheerful and confident

is similar but highlights becoming more relaxed and less serious
to turn a frown upside down
vsto lighten up
  • Informal
1 6.0

Help someone stop being sad and start smiling

also implies becoming calmer and less serious afterward
to jolly up
vsto lighten up
  • UK
1 8.2

To try to make someone feel happier when they are sad

is more about easing tension and becoming less serious
to chase away the gloom
vsto lighten up
1 5.5

Make someone feel less sad and more cheerful

also implies becoming less tense and more relaxed afterward
to lift one's spirits
vsto lighten up
3.9

To make someone feel happier

includes that uplift but stresses becoming more relaxed too
to brighten one's day
vsto lighten up
  • Informal
2.8

To make someone feel happier or more cheerful

adds the sense of relaxing and losing seriousness as well
to chirk up
vsto lighten up
  • Archaic
8.6

To make someone feel happier or more lively

places a stronger emphasis on becoming relaxed and less serious

Antonyms

85 2.7

To feel pressure and worry because of difficult situations

84 2.3

To make someone feel sad

How Cheerful

to cheer up
  • Informal
236 1.4
to lighten up
  • Informal
111 4.1
to loosen up
  • Informal
86 3.4
to relax
∞ 1.0

Surface Forms

lighten up infinitive
lightened up past participle
lightening up present participle
lightens up third person singular

Morphology

lighten + up

The meaning 'to make a place or thing brighter' is directly compositional from 'lighten' (to increase illumination or make colors lighter) plus the particle 'up' which signals increased degree or completion. This verb+particle pattern is common and cross-linguistically transparent, so a B1 learner who knows both constituents would readily infer the MWE's meaning.

Etymology

Lighten up comes from the idea of making a heavy load lighter: to lighten (make less heavy) and up (lift it away). Imagine someone taking a bag off their shoulders and suddenly smiling, so it means 'become more cheerful or relaxed'.