たゆまぬ
弛まぬ
tayumanu

Pre-noun Modifier

1. steady; sound; trustworthy

Usually Written in Kana
諸君しょくんらのたゆまぬ努力どりょく労働ろうどうによって、ついにわれらがアジトが完成かんせいした!!
shokunrano tayumanu doryokuto rōdōniyotte tsuini wareraga ajitoga kansē shita!!
Ladies and Gentlemen, thanks to your untiring efforts our hideout is finally complete!!
Pre-noun Modifier

2. assiduous; untiring; diligent

Usually Written in Kana