Merriam-Webster's Collegiate® Dictionary, 11th Edition
SNUG
I. verb (snugged; snugging)
Etymology: 2snug
Date: 1583
intransitive verb snuggle , nestle , transitive verb to cause to fit closely, to make snug, hide 1, to secure by fastening or lashing down,
II. adjective (snugger; snuggest)
Etymology: perhaps of Scandinavian origin; akin to Swedish snygg tidy
Date: circa 1595
1. manifesting seaworthiness ; taut , trim , neat , fitting closely and comfortably ,
2. enjoying or affording warm secure shelter or cover and opportunity for ease and contentment , marked by cordiality and secure privacy, affording a degree of comfort and ease , offering safe concealment , see: comfortable snug adverb snugly adverb snugness noun
III. noun
Etymology: short for snuggery
Date: 1860
a small private room or compartment in a pub