Skip to main content
PlainSpell

inside

/ˈɪnsaɪd/noun, adjective, adverb, preposition

inside is spelled I-N-S-I-D-E: 6 letters and 2 syllables. It appears 155 times per million words in written English, the 657th most frequent word form (wordfreq, 2021 data). As a noun, inside means “The interior or inner part” (English Wiktionary, September 2026). The plural of inside is insides.

How many letters and syllables are in inside?

Letters6: I-N-S-I-D-E
Syllables2 (from its American pronunciation)
In writing155 times per million words; the 657th most frequent word form
Wrong spellings searchednone measured in search

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).

How common is inside?

Inside appears 155 times per million words in written English, the 657th 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 inside?

  • /ˈɪnsaɪd/
  • /ˌɪnˈsaɪd/

Inside has 2 syllables (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: En-us-inside.ogg, Wikimedia Commons (author and licence on each file's page).

Forms of inside

  • insides plural

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does inside mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

  1. 1

    The interior or inner part.

    The inside of the building has been extensively restored.

  2. 2

    The left-hand side of a road if one drives on the left, or right-hand side if one drives on the right.

    On a motorway, you should never pass another vehicle on the inside.

  3. 3

    The side of a curved road, racetrack etc. that has the shorter arc length; the side of a racetrack nearer the interior of the course or some other point of reference.

    The car in front drifted wide on the bend, so I darted up the inside to take the lead.

  4. 4

    colloquialThe interior organs of the body, especially the guts.

    Eating that stuff will damage your insides.

  5. 5

    UKcolloquialdatedA passenger within a coach or carriage, as distinguished from one upon the outside.

  6. 6

    slangThe inside scoop; information known only to certain involved people.

adjective

  1. 1

    Of or pertaining to the inner surface, limit or boundary.

    The inside surface of the cup is unpainted.

  2. 2

    Nearer to the interior or centre of something.

    Because of the tighter bend, it's harder to run in an inside lane.

  3. 3

    Originating from, arranged by, or being someone inside an organisation.

    The reporter had received inside information about the forthcoming takeover.

  4. 4

    Legally married to or related to (e.g. born in wedlock to), and/or residing with, a specified other person (parent, child, or partner); (of a marriage, relationship, etc) existing between two such people.

  5. 5

    Toward the batter as it crosses home plate.

    The first pitch is ... just a bit inside.

  6. 6

    At or towards or the left-hand side of the road if one drives on the left, or right-hand side if one drives on the right.

    the inside lane of the motorway

adverb

  1. 1

    Within or towards the interior of something; within the scope or limits of a place, especially a building.

    I opened the book and found a hidden note inside.

  2. 2

    Indoors.

    It was snowing, so the children stayed inside.

  3. 3

    On the inner side of something.

    I cleaned the window inside.

  4. 4

    colloquialIn or to prison.

    He spent ten years inside, doing a stretch for burglary.

  5. 5

    Intimately, secretly or in one's inner heart or soul; without expressing what one is feeling or thinking.

    That's something I truly believe inside.

preposition

  1. 1

    Within the interior of, closest to the center or to a specific point of reference; on the interior side of.

    He placed the letter inside the envelope.

  2. 2

    To the interior of.

    She walked inside the house.

  3. 3

    Within (a period of time).

    The job was finished inside two weeks.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Inside in Spanish, French, German and Portuguese

LanguageWords
Frenchintérieur (interior or inner part), dedans, au-dedans, là-dedans, à l’intérieur (within the interior (position)), dans (within the interior of, closest to the center…)
GermanInnenseite, Inneres (interior or inner part), drinnen (within the interior (position)), Innen-, Inner- (of or pertaining to the inner surface, limit or…), hinein (towards the interior (movement))
Portugueseinterior (interior or inner part), dentro (within the interior (position)), dentro de (within the interior of, closest to the center…), adentro (towards the interior (movement))
Spanishinterior (interior or inner part), dentro (within the interior (position)), dentro de (within the interior of, closest to the center…), adentro (towards the interior (movement))

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 inside come from?

From Middle English ynneside; equivalent to in- + side. Compare German Innenseite (“inside”), Danish inderside (“inside”), Swedish insida (“inside”), Dutch binnenzijde (“inside”), German Low German Binnensied, Binnersied (“inside”), Saterland Frisian Binnersiede (“inside”).

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after inside