underline

Word parts

under- + line

Pronunciation

• (US) IPA ^(key): /ˈʌndɚˌlaɪn/ or /ˌʌndɚˈlaɪn/
• (UK) IPA ^(key): /ˈʌndəˌlaɪn/ or /ˌʌndəˈlaɪn/

• Audio (US)

  (file)

Verb

Plain form underline

Third-person singular underlines

Past tense underlined

Past participle underlined

Present participle underlining

1. If you underline something, you put a line under it.

   You should underline that.