pilum

This term refers specifically to the specialized weaponry of the Roman army, distinguishing it from a general javelin or spear. The design was intentionally engineered for tactical failure; the soft iron neck would buckle upon penetration, rendering the weapon useless for the opponent and often pinning multiple enemy shields together.

Because it is a technical term derived from Latin, it is used almost exclusively in historical, archaeological, or military contexts. It carries a connotation of disciplined, systemic warfare rather than primitive hunting or skirmishing.