Je was op zoek naar: tireless (Engels - Japans)

but the tireless work of a single artist.
疲れを知らない 孤独な芸術家

"tireless crusader for the virtues of atheism."
無神論を善とみなす この活動家だ

it was your tireless efforts and devotion that made the event successful.
イベントが成功したのは貴殿のたゆみ無い努力と献身のおかげです。

but she was also renown for her remarkable equestrian abilities and her tireless charitable works.
卓越した馬術と 惜しみない 慈善活動家としても 名高かったのです

you deserve a peace... befitting your extraordinary, tireless efforts... to find meaning in this life.
あなたは人生の意味を 発見するための 驚異的で疲れ知らずの 努力に適した 秩序に値します

without your extraordinary dedication, your tireless effort, your sacrifice... no one of us would be here today.
あなた達の献身と・・・ 努力と犠牲・・・ それらがなければ 今日の日はありません

there are days and days of routine, of tedious probing... of tireless searching... fruitless days, days when nothing goes right... when it seems as if no one could ever think his way... through the maze of baffling trails a criminal leaves.
何日にも及ぶ繰り返しや 地道な検証... 絶え間ない捜査... 成果のなき 失敗の連続の日々なのだ