The compound adjective 'still-young' is a modern English formation that transparently combines two native Germanic elements. The adverb 'still', with its core sense of continuity and persistence, modifies the adjective 'young' to create a nuanced meaning. This construction logically implies a state of being that remains youthful or new, often despite the passage of time or contrary to expectation. It is a descriptive phrase that has solidified into a standard hyphenated modifier, frequently used in comparative or contextual descriptions to highlight enduring youthfulness.

Structure: still (adverb) + young (adjective) still: From Old English stille (motionless, at rest, quiet). In this compound, it functions as an adverb meaning 'even now' or 'continuing to be'. young: From Old English geong, of Germanic origin. It functions as the core adjective describing an early stage of life or existence.