ill-prepared

Not well prepared. Not ready, or not in condition to do a task.

Japanese Meaning

十分な準備ができていない / 準備不足 / 用意が不十分な状態

The hiking group was ill-prepared for the sudden storm and had to seek shelter early.

ハイキングのグループは突然の嵐に対して準備不足で、早めに避難所を探さなければならなかった。

Sense（1）

Not well prepared. Not ready, or not in condition to do a task.

He was ill-prepared for the exam. I'm not surprised he failed.

more ill-prepared

（ comparative ）

most ill-prepared

（ superlative ）