This is the 9641st most frequent Japanese word.
脆弱
"脆弱" means "fragile" or "vulnerable."
In this sentence, '脆弱' is used to describe the vulnerability or weakness of a building against earthquakes.
その建物は地震に対して脆弱です。
That building is vulnerable to earthquakes.
Here, '脆弱' refers to the emotional sensitivity or fragility of a person caused by their experiences.
彼の心は過去の経験のせいで脆弱になっています。
His heart has become fragile due to past experiences.
In this instance, '脆弱' is used to convey the susceptibility of a system to potential hacking.