underscore
🇺🇸
/ˌʌndərˈskɔːr/
🇬🇧
/ˌʌndəˈskɔː(r)/
to put a line under something to show it is important
I always underscore my name to make it stand out.
to make something clear or obvious
His speech served to underscore the importance of taking immediate action.
the line symbol (_) used in writing and on computers
Please use an underscore instead of a space in your email address.