Where does “tagline” come from?

Tagline derives from English line, from Old English līn, from Proto-Indo-European līno-, a root meaning thread or flax used for making rope.

tagline (English): The punch line of a joke; An advertising slogan;...

Definitions

  1. The punch line of a joke; An advertising slogan;...

Ancestry of “tagline”, step by step

tagline traces back through two separate lines of ancestry.

via English line

StepLanguageWordMeaning
1EnglishlineA path through two or more points (compare ‘segment’); a continuous mark, including as made by a pen; any path, curved or straight
2Middle Englishlinerope, cord; line, rule, ruler, measure; rule,...
3Old Englishlīneline, rope, cord; line, cable, rope, hawser,...
4Proto-West Germanic*līnāline, chord, rope, string
5Proto-Germaniclīnǭthat which is made of flax; line, chord, rope,...
6Proto-Germaniclīnąflax
7Proto-Indo-Europeanlīno-flax

via English TAG

StepLanguageWordMeaning
1EnglishTAGTight and aggressive; Initialism of...
2Aramaicתגאcrown, diadem, tiara
3Parthian*𐫤𐫀𐫃
Every word from Proto-Indo-European līno-