努努(ゆめゆめ)certainly, absolutely, (not even) a little bit, diligently, dreams

大事(だいじ)な約束(やくそく)を努(つとむ)々忘(わす)れるな。

Absolutely do not forget an important promise. {certainly, absolutely, (not even) a little bit, diligently, dreams}

親友(しんゆう)に裏切(うらぎ)られるとは努(つとむ)々思(おも)わなかった。

I certainly never thought I would be betrayed by my best friend. {certainly, absolutely, (not even) a little bit, diligently, dreams}

隊長(たいちょう)：「努(つとむ)々油断(ゆだん)するな。我々(われわれ)は今(こん)敵(てき)に囲(かこ)まれている。」

Captain: "Don't let your guard down, not even a little bit. We are currently surrounded by the enemy." {certainly, absolutely, (not even) a little bit, diligently, dreams}

そんなところに落(お)とし穴(あな)があるとは努(つとむ)々考(かんが)えもしませんでした。

I absolutely never even considered that there would be a pitfall in such a place. {certainly, absolutely, (not even) a little bit, diligently, dreams}

約(やく)７０(ななじゅう)年(ねん)前(まえ)に起(お)きた戦争(せんそう)で多(おお)くの死者(ししゃ)が出(で)たことを努々(ゆめゆめ)忘(わす)れてはならない。

We must absolutely not forget that many people died in the war that occurred about 70 years ago. {certainly, absolutely, (not even) a little bit, diligently, dreams}