Fetching details from the dictionary...

increasingly; more and more; decreasingly (when declining); less and less
彼の人気は増々高まる一方だ。
His popularity continues to increase.
経済は増々発展していくと予想されている。
The economy is expected to develop more and more.
技術の進歩で生活は増々便利になっていく。
With technological advances, life is becoming more and more convenient.