rein in

verb

"rein-in" is a 6-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
7
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To stop or slow a horse by pulling the reins

Corpus desk

Index EN-rein-in · rein in · English

rein in · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "R" 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 rein in
PropertyValue
Headwordrein in
LanguageEnglish
Part of speechVerb
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “rein in” in English

rein insits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

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

Rare enough to double-check

rein in is uncommon English outside the top frequency list, classed as averb. Rarity is why readers land here mid-draft. 2 senses are on record.

rein in doesn't appear in our generated misspelling index, which points to an orthography that plays by predictable English rules. It is not paired with a close-neighbour confusable in our dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

No documented word history exists for this headword, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is rein in, spelled R-E-I-N- -I-N.

Definition

  1. 1
    To stop or slow a horse by pulling the reins
  2. 2
    To stop or slow something, by exercising control.

Recorded use

Wiktionary examples

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

  1. The government has no other option than to rein in public spending.
  2. “As you are well aware, over the last few months we’ve made a considerable effort to rein in costs, but it simply hasn’t been enough,” Daniel Ek, Spotify’s chief executive, said in a note to employees on Monday.

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 "rein in"?
"rein in" is spelled R-E-I-N- -I-N.
What does "rein in" mean?
As a verb, "rein in" means: To stop or slow a horse by pulling the reins
What language does "rein in" come from?
"rein in" is a English word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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