Wordnet 3.0
ADJECTIVE (1)
1. 
 not portable; 
 not easily moved or transported; 
The Collaborative International Dictionary of English v.0.48:
Unportable \Unportable\
   See portable.
WordNet (r) 3.0 (2006):
unportable
    adj 1: not portable; not easily moved or transported [ant:
           portable]