to allocate resources, usually money, in order to gain a profitable return

to devote time, effort, or energy to a particular undertaking with the expectation of a worthwhile result

समय, प्रयास या ऊर्जा लगाना

English Usage: He invests a lot of time in his fitness routine.

Hindi Usage: वह अपने फिटनेस रूटीन में बहुत समय लगाता है।