Harshly speaking

caustic
(adj)
CAW-stic
Meaning

(of language) nasty; harsh, sharp

1st Sample Sentence

His review of my new book contains some really caustic comments.

Root

kaiein (to burn) (Greek)

Synonyms

abrasive, caustic, sardonic, trenchant, vitriolic, vituperative

Mnemonics

caustic soda is very common and its "harmful " for health if taken in large quantity. therefore caustic means harmful or burning. Since its a soda its somehow related with chemistry as well. sounds like 'caution'. meaning, be careful, there is something. that is corrosive. or. 'can cause corrosion'.