The term "west-northwest" is a modern English compound formed by combining the cardinal and intercardinal directions according to the standard 32-point compass rose system. It follows a logical and transparent naming convention where the primary direction ("west") is modified by the secondary direction ("northwest") to indicate a precise point halfway between them. This method of directional naming, systematized for navigation, originates from the ancient practice of dividing the horizon, with the Germanic roots of the component words ("west" and "north") tracing back to Proto-Indo-European terms related to evening and the left side, and the underworld or "down" respectively. The compound itself illustrates a descriptive, compositional approach to vocabulary building, where the meaning is directly derived from the sum of its recognizable parts.

Structure: west (direction) + north (direction) + west (direction) - west: From Old English 'west', of Germanic origin. Denotes the cardinal direction. - north: From Old English 'north', of Germanic origin. Denotes the cardinal direction. - west: From Old English 'west', of Germanic origin. Denotes the cardinal direction.