Sentence:  Seated on the platform were Amos C. Barstow , ex-mayor of Providence and a wealthy Republican stove manufacturer ; Thomas Davis , an <WSD>uncompromising</WSD> Garrisonian ; the Reverend Augustus Woodbury , a Unitarian minister ; the Reverend George T. Day , a Free-Will Baptist ; Daniel w. Vaughan , and William H. H. Clements . 
Meaning of the word marked with <WSD> tags:  not making concessions