Shirabe
たゆまず努力
English jmdict
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb suru untiring labor (labour)
何か偉大なことを達成するためにはたゆまず努力しなければならない。
You must persevere before you can accomplish anything great.

弛むたるむ

Common Godan Intransitive
English jmdict
1
Godan verb with 'mu' endingintransitive verb word usually written using kana alone to slacken;to loosen;to relax;to droop (e.g. loose or flabby skin);to sag (ceiling)
2
Godan verb with 'mu' endingintransitive verb word usually written using kana alone to slack off (e.g. one's work, attention);to not put one's heart in