@sgunhouse creative suggestion but, doesn't work (for me).

@leocg @sgunhouse Why? Because all the example keywords in the defaults are single letter giving no indication the more letters might be accepted.
What happens? Nothing. What happens when you try it?

@leocg @sgunhouse Found the 'fix' for StartPage search. (I had the wrong URL.) The correct URL is below!! And it does work. Thanks for your encouragement.

https://www.startpage.com/do/search?query=%s&cat=web&language=english

@leocg Good to know. Will you try this one?
Use any letter; I have tried several with no results.

@leocg @sgunhouse Why? Because all the example keywords in the defaults are single letter giving no indication the more letters might be accepted.
What happens? Nothing. What happens when you try it?

@sgunhouse creative suggestion but, doesn't work (for me).

@cwinsjc 'keyword' is Opera's term. I would say 'keyletter' but..?
!image url) ...Anyway, Opera's list can be initiated using their keywords but, the "Other search engines" can not. Again, a little help needed. Thanks.

In 2019, it was posted that no default search engines could be deleted. (Sad) Prefacing a search with one of the default engine keywords does work But , the leading 'keyword' technique for an added search engine fails. Is there a 'fix'?? Or please, educate me.