I quickly found that the word <requisite> does exist. Here is a sentence I found it in, “He found most of the requisite funds at the last moment.” It is something that is essential or necessary. When seeking more information in Etymonline, I found that <requisite> is from Latin with the root requirere. The first thing I noticed is that if I take off the Latin infinitive suffix ere, I would get <requir(e)>. It is my first clue that I may have discovered a twin in my inquisition. It would make sense that a <requisite> is a requirement. Upon visiting the Latin dictionary, I find that indeed this is a twin base <quis(e)> and <quir(e)>.
This is quite neat and tidy, but there is something else that tugs at me to explore the rabbit hole further. It is that the etymonline entry for <requisite> indicated that for the most part the word <request> is mostly used in place of this word. It suggested that perhaps there is a connection to <quest> base. It is making me question quite a few things but decide to go further in my inquiry. The word <quest> is something that is asked or sought after. When researching the previous words the root quaerere kept popping up, “to seek, ask.” A connection of the base <quest> has now been connected to the bases <quire/quise>.
English words with the base of <quest> include: question, request, conquest, inquest. Although sequester (as in the separate a jury from the public) might have to do with not “saying,” but it appears that the base in this word has to do with following rather than asking or seeking. <Bequest> was also on my mind, but it turns out it is not etymologically related. The <quest> element is Old English relating to <quoth> and <bequeath>. Looking for “relatives” in the SWI process includes not only passing the structure test but also the meaning (etymological) test. In this case <sequester> and <bequest> did not pass that meaning test to be included. These are important aspects of the scientific inquiry process that surface spelling does not mean that a word or set of words gets included automatically without a series of defined criteria.
I cannot leave this conversation without the word <inquiry>. It too belongs in this set. The word sum is
It is the asking of questions. It is a quest, a seeking out. When we use the term “structured word inquiry” it is about seeking, asking and finding. It is not about being told how things are done or what the rule it. It is about being a detective and a scientist, learning, understanding for yourself as the expert scientist how the English writing system works. When you inquire direction and you acquire that knowledge through scientific inquiry, you feel you can conquer any aspect of our writing system.
A quest always ends with more questions. For further study, are any of these words are related to the above bases: quarrel, conquer, conquistador, lacquer?
Latin Dictionary: http://www.latin-dictionary.net/search/latin/requirere
Merriam Webster Dictionary: https://www.merriam-webster.com/dictionary/requisite