words wholly unrelated
dog & dog
the word for dog in mbarbaram, a recently extinct australian aboriginal language, is dog. it is pronounced the same way as in english yet it is not a loanword—it is completely coincidental.
given the limited number of sounds that can be made with one’s mouth, the amount of basic words in any given language, and the 3.2 million languages currently spoken in our solar system, uncanny coincidences like this do crop up from time to time.

