From internal +‎ -ly.

• (Received Pronunciation) IPA^(key): /ɪnˈtɜːnəli/, /-ˈtɜːnl̩i/

• Audio (Southern England):

  (file)

• (General American, Canada) IPA^(key): /ɪnˈtɜɹnəli/
• (General Australian) IPA^(key): /ɪnˈtɜːnəli/
• Hyphenation: in‧tern‧al‧ly

internally (comparative more internally, superlative most internally)

1. In an internal manner; within or inside of external limits; in an inner part or situation.

   Synonym: interiorly

2. With regard to internal affairs.
   • 2023 February 2, Patrick Noack, “Humans are terrible at planning for the future: Here's how we can change that”, in CNN‎^[1], archived from the original on 3 March 2023:

     A sort of compromise must be worked out internally and with those people and communities our decisions will impact.

3. Inwardly; spiritually.
   • 1838 (date written), L[etitia] E[lizabeth] L[andon], chapter XXI, in Lady Anne Granard; or, Keeping up Appearances.[…], volume I, London: Henry Colburn,[…], published 1842, →OCLC, page 264:

     "I cannot," said she, internally, "see that it makes any difference to him which of my daughters he takes, if, as he says, it is my admirable mode of bringing them up which has put matrimony into his head, for it is certain I have brought them up impartially...

• inly, insidely

• externally

• internally displaced person

• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “internally”, in The Century Dictionary[…], New York, N.Y.: The Century Co., →OCLC.
• “internally”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.