underwire

noun

"underwire" is a 9-letter English headword indexed on PlainSpell.

The verdict

“underwire” is uncommon English (frequency #71,195 among 1,433 “U” headwords), classed as a noun. The kind of spelling people second-guess.

#71,195
frequency rank, English
1,433
“U” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A semicircular wire placed in a bra to support the breasts.

Corpus desk

Index EN-underwire · underwire · English

underwire · rank #71,195 · 0 variants · 0 confusables

  • FREQ-RARE #71,195
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 1,433
  • PHOTO-FINISH unders

Nearest frequency peer: unders (-1 rank slots)

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.

Long-tail ranks near “underwire”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “underwire” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for underwire
PropertyValue
Headwordunderwire
LanguageEnglish
Part of speechNoun
Letters9
Frequency rank#71,195
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “underwire” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).underwirefalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “unders” (#71,194), “undiminished” (#71,196), “unenthusiastic” (#71,197). Among 1,433 “U” headwords, “underwire” is #71,195. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

underwire is uncommon English at frequency #71,195 among 1,433 “U” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.

The misspelling generator found no plausible variants for underwire, since its letter sequence doesn't invite the usual edit-distance slips. Our confusable-pair dataset has no match for it, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: From under- + wire. The correct English form is underwire, spelled U-N-D-E-R-W-I-R-E.

Definition

  1. 1
    A semicircular wire placed in a bra to support the breasts.
  2. 2
    A bra that includes such wires.

Etymology

From under- + wire.

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); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "underwire"?
"underwire" is spelled U-N-D-E-R-W-I-R-E.
What does "underwire" mean?
As a noun, "underwire" means: A semicircular wire placed in a bra to support the breasts.
What is the origin of the word "underwire"?
From under- + wire. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "underwire", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list