caustic (comparative more caustic, superlative most caustic)
1. Capable of burning, corroding or destroying organic tissue
2. (of language etc) sharp, bitter, cutting, biting, sarcastic
snake (plural snakes)
1. A legless reptile of the sub-order Serpentes with a long, thin body and a fork-shaped tongue.
2. A treacherous person.
3. A tool for unclogging plumbing.
4. A tool to aid cable pulling.