脆弱 (ぜいじゃく, zeijaku) Japanese meaning: weak | Kotomora脆
弱
だ
。
This system has weak security.
Elderly people tend to have fragile bones.
Usage patterns
〈物〉が脆弱だX is fragile/vulnerable
This system is vulnerable in terms of security.
脆弱な〈物〉a fragile/weak (thing)
Building on fragile ground is dangerous.
〈物〉が脆弱になるX becomes weak/fragile
As one ages, the bones become fragile.