deep down
"deep-down" is a 8-letter English headword indexed on PlainSpell.
The verdict
“deep down” is outside the top-ranked English vocabulary, used as an adverb - 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) - Fundamentally; in essence; in reality
| Property | Value |
|---|---|
| Headword | deep down |
| Language | English |
| Part of speech | Adverb |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “deep down” sits in English frequency
Spelling & Dictionary Insight
The English entry for deep down is 9 letters long, classified as an adverb. 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: "Fundamentally; in essence; in reality".
We couldn't generate a plausible misspelling set for deep down, and the word's spelling is regular enough that our generator found nothing worth flagging. No confusable counterpart is on file for this word, which tends to mean the word is visually distinctive enough to stand on its own.
No borrowing history is documented for this entry, so its spelling is best read as a straightforward mapping from sound to letter. The correct English form is deep down, spelled D-E-E-P- -D-O-W-N.
Definition
- 1Fundamentally; in essence; in reality
Synonyms
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
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Using “deep down”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is D-E-E-P- -D-O-W-N - 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.