Slink comes from Old English slincan ('to creep, crawl'), from Proto-Germanic *slinkaną, related to Low German slinken ('to subside'). The historical chain includes Old English slincan and Proto-Germanic *slinkaną. Older glosses in the chain include "to creep, crawl" and "to subside", which help explain the semantic range of the modern word. Morphologically, slink is best read as borrowing, yielding an English verb shaped by both form history and later usage. In current English it functions as a verb, with the sense "to move quietly and furtively, as if ashamed or stealthy". English derivatives include slinky; related forms include slank and slunk. The result is an English verb whose etymology preserves the older forms while supporting the word's specialized modern meaning.