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Verb lighten up has 2 senses
- brighten, lighten up, lighten - make lighter or brighter; "The paint will brighten the room"
--1 is one way to change, alter, modify
Sample sentences:
Somebody ----s something
Something ----s something
- lighten, lighten up - become lighter; "The room lightened up"
--2 is one way to change
Sample sentence:
Something ----s
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