Unknown, likely Germanic. Compare Dutch spraak (“speech”), spreek (“speak”), spreuk (“saying”), sprook (“a story, fiction, tale, or false idea”).
spruik (third-person singular simple present spruiks, present participle spruiking, simple past and past participle spruiked)
- (transitive, Australia) To promote a thing or idea to another person.
- 1948, Louis Esson, Louis Esson and the Australian Theatre, page 18,
- There was no spruiking or showmanship, no flash shirts or ten-gallon hats.
- 2008 December 30, Lennon spruiks laptop 28 years after his death, The Sydney Morning Herald.
- 2011, Kylie Ofiu, Work as a spruiker, 365 Ways to Make Money, page 120,
- It can be a hard job, constantly on your feet, trying to think of things to say to lure people into the store you are spruiking for.