spruce or fir, more specifically a tree of the Picea or Abies genera or any conifer with needle-leaves and a triangular or conical shape.
Sindarin êg, thorn, because they have thorn-like leaves, thela, spearhead, because they look like spearheads from a distance.
Sindarin ecthel, spearpoint, thorn-point
Sindarin thôn, pine-tree.
Hialmr