damageful

rare

(rare) Characterised by or causing damage; harmful

Japanese Meaning

損害を与える / 有害な

The chemical spill had a damageful effect on the river's ecosystem, killing fish and plants along the banks.

その化学物質の流出は河川の生態系に有害な影響を及ぼし、川岸の魚や植物を死滅させた。

Sense（1）

(rare) Characterised by or causing damage; harmful

more damageful

（ comparative ）

most damageful

（ superlative ）