Planting an Etymological Tree for  

Thanks! I love hearing these tidbits from languages I don’t know as well.

@@Alliterative Not at all. Kurdish is an Indo-Iranian language. It sound like Indian and Persian.

(Of course, Elizabeth II was actually the child of the first "non-royal" marriage in the British royal line, her mother having been "only" nobility. Though that's still more closely related than the general public are.)

It’s a fairly obscure reference, not slang, so it’s not surprising you didn’t know it. On our website under “about” we’ve described it this way: “The "endless knot" is a common visual motif of an interconnected knot with no beginning or end, found in many cultures around the world. My use of the phrase here is a reference to the 14th century poem Sir Gawain and the Green Knight, in which it refers to the emblem of the pentangle or pentagram which Gawain has emblazoned on his shield, where it is a symbol of interconnectedness of things-a pentagram can be drawn without ever lifting the pen from the page, and each point is connected to two other points of the star. Here at The Endless Knot it also gains significance from its comparison to the cognitive science hexagram or heptagram which shows the interrelated nature of various fields in cognitive science. I've created my own Endless Knot pentagram based on this notion which connects cognitive science, linguistics, literature, history and anthropology, which are all areas you’ll see related here.”

You mixed up "Gaelic" and "Goidelic". There are two types of Gaelic: Goidelic, and Brythonic. Welsh and Breton are Brythonic, Irish and Scots are Goidelic. In the Goidelic branch, the "p" sound was turned into the "k" sound. In the Brythonic branch, it remains unchanged. So yes, "mac" is cognate to "ap": both meaning "son of". Although that rule stopped being a thing sometime after the Roman era. So there are now Irish words with the "p" sound, but it's pretty uncommon.

I’m curious about this myself

Ah, that’s a regular sound change that happens in Proto-Italic. Most of the voiced aspirated stops in PIE, bh, dh, and gwh, become f in the Italic languages, which is why the English verb do from PIE *dhe- “to set, put” is related to Latin facere “to make, do”, from which we get words such as fact and factory. But the really interesting thing is the vowel. In PIE that vowel change from e to o indicates that it’s a plural (or dual) form, so the forms door and foris are historically plural. As a result, it is believed that Indo-Europeans doors had two swinging halves.

@@sophiejones7727 you just prove "english speakers" should stay with "good economy,strong military" and not go any further and insult people who know more languages , level of nonsense you presented is very worrying .

@tombra7 If you don't accept the academic consensus that the PIE hypothesis is the best explanation for language change and current languages, and forms the basis of all reputable etymological sources for English, then you won't agree with any of the videos on this channel. It is your choice whether you watch them or not, but continuing rudeness to me or to other commenters will result in you being blocked from commenting.

@@Alliterative so do you only accept viewers , who agree with you ? also what is your definition of rudeness? is "Get your head out of your ass, and get your shit together" polite way of conversation in your opinion ? I do appreciate your videos, they are very clever and interesting , shame such an intelligent person can`t be more open and refuse to get any critic (on topic, not on you personally) .

I’m not interested in this kind of rudeness from either side of the debate. Any further insults on this thread and I’m deleting it.

@@Alliterative sorry, I'll clean up my mess. I didn't mean to hurt you. I'm glad to see that you are such a good steward of your channel :)