bad apple

noun

"bad-apple" is a 8-letter English headword indexed on PlainSpell.

The verdict

“bad apple” is outside the top-ranked English vocabulary, used as a noun - the kind of word writers most often double-check.

Unranked
below top-frequency English
9
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A person who is not wholesome, honest, or trustworthy, especially one who has an adverse influence on others.

Key facts for bad apple
PropertyValue
Headwordbad apple
LanguageEnglish
Part of speechNoun
Letters9
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “bad apple” sits in English frequency

bad apple falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for bad apple is 9 letters long, classified as a noun. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "A person who is not wholesome, honest, or trustworthy, especially one who has an adverse influence on others.".

bad apple has no tracked misspelling variants, a straightforward case of a spelling with little room for common typos. We don't track a confusable pairing for this entry, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From the proverb “one bad apple can spoil the whole bunch” (or a variant thereof). The correct English form is bad apple, spelled B-A-D- -A-P-P-L-E.

Definition

  1. 1
    A person who is not wholesome, honest, or trustworthy, especially one who has an adverse influence on others.

Etymology

From the proverb “one bad apple can spoil the whole bunch” (or a variant thereof).

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "bad apple"?
"bad apple" is spelled B-A-D- -A-P-P-L-E.
What does "bad apple" mean?
As a noun, "bad apple" means: A person who is not wholesome, honest, or trustworthy, especially one who has an adverse influence on others.
What is the origin of the word "bad apple"?
From the proverb “one bad apple can spoil the whole bunch” (or a variant thereof). See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “bad apple”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is B-A-D- -A-P-P-L-E - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list