characterized by or involving community of responsibilities and interests.
Origin of solidary
1810–20; < French solidaire, Middle French; see solid, -ary1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
marked by unity of interests, responsibilities, etc
Word Origin for solidary
C19: from French solidaire, from solide solid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1818, from French solidaire (16c.), from solide (see solid (adj.)).
Online Etymology Dictionary, © 2010 Douglas Harper