Sentence:  He will ever be my example as a true statesman ; one who is thoroughly human , who affects no dignity , and who is endowed with real ability , genuine worth , and sterling honesty - all dedicated to secure the best interests of the country he has loved and <WSD>served</WSD> so long . 
Meaning of the word marked with <WSD> tags:  devote (part of) one's life or efforts to, as of countries, institutions, or ideas