1. Not addressed
   "an unaddressed envelope"

Antonym: addressed

• least resistance
• least sandpiper
• least shrew
• least squares
• leastways
• leastwise
• leat
• leather
• leather carp
• leather fern
• leather flower
• leather soap
• leather strip
• leather-leafed
• leather-leaved
• leatherback
• leatherback turtle
• leathered
• leatherette
• leatherfish
• leatherjack
• leatherjacket
• leatherleaf
• leatherleaf fern
• leatherleaf saxifrage