'Lo lamento' is a Spanish phrase meaning 'I am sorry.' Welch told Loudwire
the story of the track: "'Lo Lamento' is a song that came from an idea producer Jasen Rauch and writer Mark Holeman had on our last album, Between Here And Lost
. It was actually the original chorus for our song 'I W8 4 U', but it sounded way too melodic for that crushing song, as you can imagine. To me, 'Lo Lamento' paints a picture lyrically about infidelity and a once picture perfect relationship left in ruins."