hip-deep

The compound adjective "hip-deep" is a straightforward combination of two native English words. "Hip," tracing back to Old English hype, denotes a specific anatomical landmark. "Deep," from Old English dēop, is a fundamental term for measurement and intensity. When combined, they create a vivid, literal measurement of depth—up to the level of the hips. This concrete, physical sense naturally evolved a figurative meaning, used to describe being thoroughly immersed or heavily involved in an activity, situation, or condition, leveraging the metaphor of being submerged in a substance.

Structure: hip (body part) + deep (measurement) - hip: From Old English hype, of Germanic origin; refers to the projecting part of the body formed by the pelvis and upper thigh. - deep: From Old English dēop, of Germanic origin; refers to a great vertical or profound extent downward or inward.