This is the 8762nd most frequent Japanese word.
期す
"期す" means "to expect, to anticipate, or to set one's mind on."
期す in this context refers to aiming or having the intention to accomplish success.
成功を期して、努力を重ねました。
I worked hard with the intention of achieving success.
期す here means to expect or hope for something, expressing anticipation.
未来に大きな期待を期している。
I have high hopes for the future.
期された here is the passive form of 期す, implying the results that were anticipated or intended.