underscore (EN)

noun, verb

noun “underscore”

1. a line drawn or printed under text, represented by the character _
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   In her email, she used underscores to separate the words in her username, like [email protected].
2. background music in a film, TV show, or other presentation
   The gentle piano underscore made the romantic scene even more touching.

verb “underscore”

1. to draw a line under text to highlight it
   In her notes, she underscored the key points to remember for the exam.
2. to emphasize
   The report underscores the need for immediate action on climate change.