Two possible explanations exist concerning the etymological derivation of this verb. In linguistics, cognates are words that have a common etymological origin. Such external etymologies are not included in standard etymological reference works. He explains words on the basis of their grammatical construction and their etymological development. Darren is a masculine given name of uncertain etymological origins. The term's etymological origins are disputed. The word "mantra" is used here in its etymological signification. Thus, the proportion of Germanic words without any plausible etymological explanation has decreased over time. Most etymological dictionaries are silent about it. This has led to arguments on the exact origins of gunpowder based on etymological foundations. The spelling retained the digraph for etymological reasons. The difference in spelling is thus purely etymological. However, there are other terms with less obvious origins, which are of etymological interest. It is not represented in orthography, where more etymological principles are applied. A number of popular etymological speculations were offered by early modern Rabbinic authorities.