sympathetic ink

noun

Invisible ink.

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Meanings

nounsympathetic ink (countable and uncountable, plural sympathetic inks)

plural sympathetic inks

  1. countabledateduncountableInvisible ink.

    "I've got it! Sympathetic ink!" "You think so?" "Worth trying anyhow. Heat usually does the trick. Get some sticks. Well make a fire."

    1922, Agatha Christie, The Secret Adversary

Synonyms & antonyms

Also see
invisible ink
Cite this entry
APA

sympathetic ink. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/sympathetic%20ink

MLA

“sympathetic ink.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sympathetic%20ink. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “sympathetic ink,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/sympathetic%20ink.

Source: sympathetic ink on Wiktionary, CC BY-SA 4.0.