Etymologically
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inside

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Pronunciation

  • IPA: /ˌɪnˈsaɪd/[1]

Etymology

It is a compound, from English in + side,[2][3][4] originally Middle English ynneside, from the adverb inne (“inside”) and side, later understood as a compound of the preposition.[5] Barnhart notes that inside and its opposite outside appeared at about the same time.[5]

Earliest recorded meaning

The interior of the body: 1392, ynneside,[5] or the late 14th century.[2]

Semantic evolution

The inner side or surface of anything is from 1504[6][5] or about 1500,[2] and the inner part or interior from about 1550.[6] The inward nature or mind is from 1599.[6] The adjective “inner, internal” is from 1611, in Shakespeare,[5][7] or the 1610s.[2] The adverb is from the 15th century[7] and the preposition from 1791.[7][4] About 1900 the word began to be used in slang of the real facts known only to insiders,[2] and the noun “inner history, real facts” is from 1904.[6] Inside job, a crime done with help from within, is American English by 1887, and inside man from 1911.[2] Inside track, “advantage”, is from 1854, a metaphor from horse racing, the inside lanes of a curved track being shorter.[2] Inside of, of time, is American English from 1839.[2] Inside out is from before 1600.[6]

Timeline

  • 1392 – ynneside, the interior of the body.[5]
  • 1504 – the inner side.[6]
  • c. 1550 – the interior.[6]
  • 1611 – adjective (Shakespeare).[5]
  • 1791 – preposition.[7]
  • 1839 – inside of, of time.[2]
  • 1854 – inside track.[2]
  • 1887 – inside job.[2]

Modern meaning

Noun

  1. An inner or interior part, side or surface.
  2. (insides) The inner organs; the inner workings.
  3. Inward character or feelings.
  4. Confidential information, or a position that gives access to it.

Adjective

  1. Inner, interior.
  2. Coming from or known to an exclusive group: inside information.

Adverb

  1. Into or in the interior; within.
  2. (slang) In prison.

Preposition

  1. Within; on or into the inner part of.
  2. (inside of) Within a period of time.

Word family

  • insider
  • inside job
  • inside of
  • inside out

Usage notes

The American Heritage Dictionary notes that inside of has been criticized as redundant or colloquial, but is well established in formal writing, especially of time.[8]

References

  1. ^ Jones, Daniel (2011), Cambridge English Pronouncing Dictionary, 18th ed., ed. Peter Roach, Jane Setter and John Esling, Cambridge: Cambridge University Press
  2. ^ a b c d e f g h i j k Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  3. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  4. ^ a b Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  5. ^ a b c d e f g Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  6. ^ a b c d e f g Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  7. ^ a b c d Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  8. ^ The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin