This is the 2022nd most frequent Russian word.
частично
Partially.
Here, 'частично' specifies the degree to which the task was completed, indicating it is not fully done but partly achieved.
Он частично выполнил задание.
He partially completed the task.
In this sentence, 'частично' describes the extent of the destruction, denoting that only part of the city suffered damage.
Город был частично разрушен после шторма.
The city was partially destroyed after the storm.
The term 'частично' in this context indicates that the answer met some of the teacher's expectations but not all of them.