hatasu
hateru

hatasu ??? is a Japanese word represented by the symbol for rice paddy on top of the symbol for tree. Its most basic meaning is related to the idea of fruitfulness, bearing fruit, coming to fruition, and in combination with other kanji, it always refers to literal fruit: kajitsu ??: "fruit"; kashokusei ???: "fruit-eating, fructivorous"; kashokudoubutsu ????: frugivore.

Anyway, the most common use of the word hatasu is when describing the carrying out of a public duty (yakume) or pledge/promise (yakusoku), or private/moral duty (gimu) or role (yakuwari) - all of which has obvious connections to the turning out of results that is fruition.

So to perform one's official duty is yakume o hatasu ??????, to play a role is yakuwaki o hatasu ??????, and to fulfill a promise is yakusoku o hatasu ??????.
However, hatasu can be stretched to include the meanings of serve, deliver, put to work, accomplish, live up to. For example, "The city delivered on its promise to improve the quality of drinking water." shi ga inryosui o kaizen suru yakusoku o hatashita ??????????????????Simply to "keep its promise" would be yakusoku o mamoru ?????, so hatasu brings with it the more robust meaning of "delivering on."

Oddly, however, the related word hateru ??? - the same "ha" kanji but with "teru" attached instead of "tasu," has a completely different meaning. hateru means to peter out, fizz, grind...