suru verb (special), transitive verb
Used for reaching a destination, level, amount, or goal. Often implies a process or progression leading to the point. Can be used concretely (place) or abstractly (conclusion, agreement).
山頂に達するまであと一時間だ。
It's another hour until we reach the summit.
The negotiations finally reached an agreement.
気温が40度に達した。
The temperature reached 40 degrees.