in
/ɪn/preposition, adverb, noun, adjective
in is spelled I-N: 2 letters and one syllable. It appears 18,621 times per million words in written English, the 6th most frequent word form (wordfreq, 2021 data). People search “en vs in” about 50 times a month (Google, United States). As a preposition, in means “Contained by; inside” (English Wiktionary, September 2026).
How many letters and syllables are in in?
| Letters | 2: I-N |
|---|---|
| Syllables | 1 (from its American pronunciation) |
| In writing | 18,621 times per million words; the 6th most frequent word form |
| Wrong spellings searched | none measured in search |
| Pairs people search | |
| Sounds like |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How common is in?
In appears 18,621 times per million words in written English, the 6th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce in?
- /ən/
- /ɪn/
- /ɘn/
In has one syllable (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Pvanp7-in_a_while_(unstressed).wav, LL-Q1860_(eng)-Pvanp7-in_(stressed).wav, En-us-in.ogg, Wikimedia Commons (author and licence on each file's page).
Words people confuse with in
Word pairs people search, with the monthly searches for “a vs b” (G: Google, B: Bing, United States).
Sounds like: inn (Wiktionary's homophone list; some hold only in some accents).
Sources: Google and Bing searches (September 2025 to August 2026, through DataForSEO); English Wiktionary (homophones, alternative spellings).
Forms of in
- i'
- ins present, singular, he/she/it, plural
- inning participle, present
- inned participle, past
- more in comparative
- most in superlative
- in.
- i-
- il-
- en-
- ins. plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does in mean?
The meanings the English Wiktionary records, quoted as written there (source below).
preposition
- 1
Contained by; inside.
The dog is in the kennel.
- 2
Within the bounds or limits of.
I like living in the city.
- 3
Surrounded by; among; amidst.
We are in the enemy camp.
- 4
Wearing (an item of clothing).
I glanced over at the pretty girl in the red dress.
- 5
Expressing abstract containment.
There wasn't much of interest in her speech.
- 6
Part of; a member of; out of; from among.
You are one in a million.
- 7
During (a period of time or event).
My birthday is in the first week of December.
- 8
Within (a certain elapsed time); by the end of.
Will you be able to finish this in a week?
adverb
- 1
At or towards the interior of a defined space, such as a building or room.
Suddenly a strange man walked in.
- 2
Towards the speaker or other reference point.
They flew in from London last night.
- 3
So as to be enclosed or surrounded by something.
Bring the water to the boil and drop the vegetables in.
- 4
After the beginning of something.
The show still didn't become interesting 20 minutes in.
- 5
Denotes a gathering of people assembled for the stated activity, sometimes, though not always, suggesting a protest.
sing-in, pray-in, hug-in; see also be-in, love-in, sit-in, teach-in.
noun
- 1
A position of power or influence, or a way to get it.
His parents got him an in with the company.
- 2
One who, or that which, is in; especially, one who is in office.
- 3
The state of a batter/batsman who is currently batting; see innings.
- 4
Abbreviation of inch or inches.
adjective
- 1
Located indoors, especially at home or at one's office or place of work.
Is Mr. Smith in?
- 2
Located inside something.
Little by little I pushed the snake into the basket, until finally all of it was in.
- 3
Falling or remaining within the bounds of the playing area.
If the tennis ball bounces on the line then it's in.
- 4
Inserted or fitted into something.
I've discovered why the TV wasn't working – the plug wasn't in!
- 5
Having been collected or received.
The replies to the questionnaires are now all in.
- 6
In stock, available in stores (particularly of a new item).
Our latest product is in!
- 7
In fashion; popular.
Skirts are in this year.
- 8
Incoming.
the in train
noun
- 1
Abbreviation of integrase.
- 2
Abbreviation of internegative; a type of film stock, most commonly used regarding 35mm motion picture negative
verb
- 1
obsoleteTo enclose.
- 2
obsoleteTo take in; to harvest.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
In in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | dans , en , dedans, à l'intérieur , entrée , à la mode |
| German | in , herein, hinein , von , unter, im |
| Portuguese | em, dentro de , para dentro , em alta, na moda, in |
| Spanish | en, dentro de , adentro de , hacia adentro , de moda , durante |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does in come from?
Preposition and verb from Middle English in, from Old English in, from Proto-Germanic *in. Adverb, noun and adjective from Middle English in, from Old English inn and inne, from Proto-Germanic *innai. Sense 1/2 "in"/"into" are from the original PIE prefix, with locative/accusative case respectively. Sense 3/4 "qualification"/"means" are from the PIE metaphor of all infinitives coming from locatives.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).