Slink

google

ref

Old English slincan ‘crawl, creep’; compare with Middle Dutch and Middle Low German slinken ‘subside, sink’.

wiktionary

ref

From Middle English slynken, sclynken, from Old English slincan(“to creep; crawl”), from Proto-Germanic *slinkaną(“to creep; crawl”), from Proto-Indo-European *sleng-, *slenk-(“to turn; wind; twist”), from Proto-Indo-European *sel-(“to sneak; crawl”). Cognate with West Frisian slinke, Dutch slinken(“to shrink; shrivel”), Low German slinken, Swedish slinka(“to glide”). Compare also German schleichen(“to slink”). More at sleek.

etymonline

ref

slink (v.)

Old English slincan "to creep, crawl" (of reptiles), from Proto-Germanic *slinkan (source also of Swedish slinka "to glide," Dutch slinken "to shrink, shrivel;" related to sling (v.)). Of persons, attested from late 14c. Related: Slinked; slinking.