first cousin

noun

"first-cousin" is a 11-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
12
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A child of a parent's sibling; a nephew or niece of a parent; a child of one's uncle or aunt.

Corpus desk

Index EN-first-cousin · first cousin · English

first cousin · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 12 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "F" 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 first cousin
PropertyValue
Headwordfirst cousin
LanguageEnglish
Part of speechNoun
Letters12
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “first cousin” in English

first cousinfalls 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

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

No generated misspelling entries exist for first cousin in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. We don't track a confusable pairing for this entry, which tends to mean the word is visually distinctive enough to stand on its own.

This entry's etymology isn't recorded, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct English form is first cousin, spelled F-I-R-S-T- -C-O-U-S-I-N.

Definition

  1. 1
    A child of a parent's sibling; a nephew or niece of a parent; a child of one's uncle or aunt.
  2. 2
    A relative who has with the other person only two grandparents or one grandparent (maternal or paternal) in common, but parents are different.
  3. 3
    Anything closely related.

Recorded use

Wiktionary examples

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

  1. […] that coarseness which is first cousin to sin.
  2. [H]e was afraid the Mexicans, who were, he claimed, first cousin to the spigotties, would catch us off our guard and give us the same treatment.

Synonyms

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 "first cousin"?
"first cousin" is spelled F-I-R-S-T- -C-O-U-S-I-N.
What does "first cousin" mean?
As a noun, "first cousin" means: A child of a parent's sibling; a nephew or niece of a parent; a child of one's uncle or aunt.
What language does "first cousin" come from?
"first cousin" is a English word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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