たゆまぬ
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