Origin of caustic
Examples from the Web for caustically
If he was getting hot around the collar, Ziffer said caustically, it was "partly because I'm one of those hot-headed Levantines."
“Only blue-eyed blondes get any press,” he caustically wrote.
"'The way is clear enough wi'oot that," from Tammas caustically.Bob, Son of Battle|Alfred Ollivant
"Darcy was always too smooth for our present taste," said Heffernan, caustically.The Knight Of Gwynne, Vol. II (of II)|Charles James Lever
"That is very easy to say, uncle," replied Gonzalo caustically.The Fourth Estate, vol. 2|Armando Palacio Valds
"We are not playing at tin politics nowadays," he caustically remarked.The Secret of the League|Ernest Bramah
The voice said caustically: "Unfortunately, we've nothing to do anything with."Space Tug|Murray Leinster