>>611
突っ込むならそこじゃなくてgoodとbyの間に突っ込まなきゃ

https://whatis.techtarget.com/feature/Good-bye-good-by-goodbye-goodby
より一部引用
基礎学力があるだろうから英語で読んでね

... However, if you aren’t constrained by a style guide, you can probably get away with any variation you choose.

@EditorMark argues for saying goodbye to the hyphen and reports on various guides:

“The American Heritage and Webster’s New World dictionaries list goodbye as the first spelling. Bryan Garner in “Garner’s Modern American Usage,” compares the hyphenated form to the archaic “to-day.”

Merriam-Webster, though, includes only “good-bye” and “good-by.” Many style guides, including the Chicago Manual of Style, prefer a Merriam-Webster dictionary, so “good-bye” is with us for now.

The word in any form is only a few hundred years old, stemming from the earlier “good morning” and “good day,” etc., and a shortening of the phrase ‘God be with you.’”