caustic

处理这些腐蚀性清洁剂时要戴上手套。

Wear gloves when handling these ___caustic cleaners.

这些评论是刻薄的，带有灼烧般的尖锐。

The remarks are ___caustic, burning in their intensity.

她用一句尖锐刻薄的反驳回应了那不公平的批评，让全场鸦雀无声。

She responded to the unfair criticism with a ___caustic retort that left the room silent.