This is the 7936th most frequent Japanese word.
壊れる
To break; to be broken.
In this sentence, 壊れる (kowareru) is used to describe the breaking or malfunctioning of a smartphone, a physical object.
スマートフォンが壊れたので、新しいものを買いました。
Since my smartphone broke, I bought a new one.
Here, 壊れる is used in the context of an old clock, specifying damage due to exposure to rain.
古い時計が雨に濡れて壊れてしまいました。
The old clock got wet in the rain and broke.
In this usage, 壊れる is metaphorically used to describe the concept of 'breaking' applied to a relationship, specifically friendship.