arrowhead is a compound of the native English arrow (from Old English arwe, from Proto-Germanic *arhwō) and head (from Old English heafod). Morphologically, the word is transparent as a compound: its parts remain visible in the modern spelling, while the older history of those parts supplies the deeper ancestry. In modern use, the noun sense is "the pointed striking head of an arrow, or a marsh plant with arrow-shaped leaves", which keeps the etymology connected to the word's present dictionary value rather than treating it as a merely historical label. The wider word family includes related English forms such as arrow, head, showing how the same base continues to support neighboring English vocabulary. The principal historical forms in the chain include Old English arwe, Old English heafod, which anchor the explanation in named linguistic material.