1. Fitting closely
   "the vest fit snugly" 
2. Safely protected
   "concealed snugly in his hideout" 
3. Warmly and comfortably sheltered
   "sitting snugly by the fireside while the storm raged"

See also: snug

• income tax bracket
• income tax return
• incomer
• incoming
• incommensurability
• incommensurable
• incommensurate
• incommode
• incommodious
• incommodiousness
• incommunicable
• incommunicado
• incommunicative
• incommutability
• incommutable
• incomparable
• incomparably
• incompatibility
• incompatible
• incompatibly
• incompetence
• incompetency
• incompetent
• incompetent cervix
• incompetent person