From Middle English stille ("motionless, stationary"), from Old English stille ("still, quiet, calm; without motion, at rest, not moving from a place, not disturbed; moving little or gently; silent; not loud; secret; unchanging, undisturbed, stable, fixed; not vehement, gentle"), from Proto-West Germanic *stillī ("quiet, still"), from Proto-Indo-European *(s)telH- ("to be silent; to be still"). Cognate with Scots stil ("still"), Saterland Frisian stil ("motionless, calm, quiet"), West Frisian stil ("quiet, still"), Dutch stil ("quiet, silent, still"), Low German still ("quiet, still"), German still ("still, quiet, tranquil, silent"), Swedish stilla ("quiet, silent, peaceful"), Icelandic stilltur ("set, quiet, calm, still"). Related to stall.
Military slang, short for still a Benny, since the military had been instructed not to refer to the islanders by the derogatory term Benny (which see).