Dictionary.com
Thesaurus.com
Synonyms

untiring

British  
/ ʌnˈtaɪrɪŋ /

adjective

  1. (of a person or their actions) continuing or persisting without declining in strength or vigour

"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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He has long been encouraged to aim toward concision, especially in his longer numbers, in which his untiring improvisations can become exhausting in their many climaxes.

From Los Angeles Times

He was awarded the Nobel Peace Prize in 2002 for “decades of untiring effort to find peaceful solutions to international conflicts” and to advance democracy and human rights.

From Los Angeles Times

Carter’s Nobel citation honored “his decades of untiring effort” to resolve conflicts, promote democracy and foster economic development.

From Seattle Times

Carter won in 2002 in part for his "untiring effort to find peaceful solutions to international conflicts."

From Reuters

The Nobel committee cited “his decades of untiring effort to find peaceful solutions to international conflicts, to advance democracy and human rights, and to promote economic and social development.”

From Washington Post