Sentence:  The admirable material structure of our noble Universities, the broad basis which unnumbered zealous benefactors have laid, the schools connected with them which spread over the whole kingdome, the sympathies and venerable remembrances with which their names are entwined, give them substance for a perpetual youth, <WSD>co-enduring</WSD> with the energies of the British nation, the prime talent of which they will long have the means of picking. 
Meaning of the word marked with <WSD> tags:  To endure alongside someone or something, to coexist over time.