säästettäessä
The Finnish word "säästettäessä" is a temporal adverbial form of the verb "säästää," which means "to save" or "to conserve." When used in a sentence, "säästettäessä" indicates a situation or time frame during which saving or conserving is taking place. It translates directly to "when saving" or "while conserving." The grammatical form itself, the inessive case of the participle, implies an ongoing action.
For example, in the phrase "säästettäessä energiaa," the meaning is "when saving energy" or "while conserving