1. 
   underpin
   [v] - support from beneath
   Found op http://www.webdictionary.co.uk/definition.php?query=underpin
   
   
2. 
   Underpin
   To provide a new support under an existing structure without removal of the super structure.
   Found op http://www.corusconstruction.com/en/design_guidance/the_blue_book/
   
   
3. 
   Underpin
   • (v. t.) To support by some solid foundation; to place something underneath for support. • (v. t.) To lay stones, masonry, etc., under, as the sills of a building, on which it is to rest.
   Found op http://thinkexist.com/dictionary/meaning/underpin/
   
   
4. 
   underpin
   1) Hold 2) Hold up 3) Support 4) Support from beneath 5) Sustain
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/underpin/1
   
   

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