boil down

verb

"boil-down" is a 8-letter English headword indexed on PlainSpell.

The verdict

“boil down” is uncommon English (outside the top frequency list), classed as a verb. The kind of spelling people second-guess.

Unranked
below top-frequency English
9
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To reduce in volume by boiling.

Corpus desk

Index EN-boil-down · boil down · English

boil down · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 9 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "B" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for boil down
PropertyValue
Headwordboil down
LanguageEnglish
Part of speechVerb
Letters9
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “boil down” in English

boil downfalls 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.

Rare enough to double-check

boil down is uncommon English outside the top frequency list, classed as averb. Rarity is why readers land here mid-draft. 3 senses are on record.

No generated misspelling entries exist for boil down in our index, a straightforward case of a spelling with little room for common typos. We don't track a confusable pairing for this entry, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: As an allusion to the technique of reduction or decreasing liquid content of food by boiling much of its water off. The correct English form is boil down, spelled B-O-I-L- -D-O-W-N.

Definition

  1. 1
    To reduce in volume by boiling.
  2. 2
    To become reduced (to the most central elements or ingredients: to the essence, core, or implication for action).
  3. 3
    To reduce (to the most central elements or ingredients: to the essence, core, or implication for action).

Recorded use

Wiktionary examples

These source excerpts show how boil down appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. He boiled the soup down so it wouldn't be so weak.
  2. So what this boils down to is that you still owe me that fifty bucks.

Etymology

As an allusion to the technique of reduction or decreasing liquid content of food by boiling much of its water off.

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

How do you spell "boil down"?
"boil down" is spelled B-O-I-L- -D-O-W-N.
What does "boil down" mean?
As a verb, "boil down" means: To reduce in volume by boiling.
What is the origin of the word "boil down"?
As an allusion to the technique of reduction or decreasing liquid content of food by boiling much of its water off. 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.

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

Source: FrequencyWords open word-frequency list