長い
ながい · nagai · JLPT N5 · i-adj
long
🐍 naga-i: a naga is a serpent, and a serpent is long
The stem naga matches naga, the serpent of Indian myth, a creature defined by its length. Add the adjective ending -i and you get nagai = long. The kanji 長 also means chief or elder, someone long in years.