Enter a clue or pattern or both:

The Clue

Acid (7 letter answer)

The Answer

CAUSTIC

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Notes

The answer CAUSTIC is so rare that it appears less than once every 2900 puzzles.

Related Clues

Biting
Severely critical
That's a lye!

Definition

CAUSTIC as a noun:

1. any chemical substance that burns or destroys living tissue

CAUSTIC as an adjective:

1. (acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, venomous, virulent, vitriolic) = harsh or corrosive in tone; "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"; "a vitriolic critique"
2. (caustic, corrosive, erosive, vitriolic, mordant) = of a substance, especially a strong acid; capable of destroying or eating away by chemical action