ЕСУМ І, 352 (вергати) верг "кидок; поштовх; шар".

Розуміти мотивацію значенням корене даного ту слова дасть змінка в обговоренні тями (sales) pitch ту: https://english.stackexchange.com/questions/288246/when-did-the-sales-pitch-start#:~:text=1) 1520s, "something that,perhaps from the baseball sense:

"I think Etymonline at least supports the premise that the origin of 'Sales Pitch' derives from the meaning of 'Pitch' as "to throw" dating from 1833

pitch (n.1) 1520s, "something that is pitched," from pitch (v.1). Meaning "act of throwing" is attested from 1833. Sales pitch in the modern commercial advertising sense is from 1943, American English, perhaps from the baseball sense.

https://www.etymonline.com

In this sense one is "pitching" (throwing) something to the listener, in the same way that you can 'pitch' an idea. It is a short leap from there to 'pitch' your sales patter to a potential buyer, which becomes naturally a Sales Pitch."

sum.in.ua: skhyljaty Навертати, спрямовувати, приваблювати до кого-, чого-небудь.

як у риболовлі

Це такий свисток, щоб приманювати качок під час полювання -- здається, схоже.

http://hrinchenko.com/slovar/znachenie-slova/51065-rich.html#show_point