1. Not defended or capable of being defended
   - assailable, undefended, open

See also: vulnerable

• portion
• portion out
• portière
• Portland
• Portland cement
• portliness
• portly
• portmanteau
• portmanteau word
• Porto
• Porto Alegre
• Porto Novo
• Porto Rico
• portolan
• portolano
• portrait
• portrait camera
• portrait lens
• portrait painter
• portraitist
• portraiture
• portray
• portrayal
• portrayed
• portrayer