This is the 15273rd most frequent German word.
unermüdlich
Tireless.
Adjective describing the runner.
Der unermüdliche Läufer gewann das Rennen.
The tireless runner won the race.
Adverb describing her manner of working.
Sie arbeitete unermüdlich an ihrem Projekt.
She worked tirelessly on her project.
Adjective describing dedication.