Definify.com

Webster 1913 Edition

Ad-

‖

Ad-

.
[A Latin preposition, signifying
to
. See
At
.]
As a prefix ad- assumes the forms ac-, af-, ag-, al-, an-, ap-, ar-, as-, at-, assimilating the d with the first letter of the word to which ad- is prefixed. It remains unchanged before vowels, and before d, h, j, m, v. Examples: adduce, adhere, adjacent, admit, advent, accord, affect, aggregate, allude, annex, appear, etc. It becomes ac- before qu, as in acquiesce.

Definition 2024

ad-

ad-

See also: Appendix:Variations of "ad"

English

Prefix

ad-

  1. near, at.
    adrenal.
  2. toward, to, tendency, or addition.
    adjoin.

Translations

References

  • “ad-” in The American Heritage Dictionary of the English Language, Fourth Edition, Houghton Mifflin Company, 2000.
  • “ad-” in Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.

Ido

Etymology

Prefix form of ad.

Prefix

ad-

  1. to (indicating that to which there is movement, tendency or position, with or without arrival)
    portar ‎(“carry, bear”) → adportar ‎(“bring, carry (to a person or place)”)
    ube ‎(“where”) → adube ‎(“where to (with motion), whither”)

Derived terms

<a class='CategoryTreeLabel CategoryTreeLabelNs14 CategoryTreeLabelCategory' href='/wiki/Category:Ido_words_prefixed_with_ad-'>Ido words prefixed with ad-</a>

Latin

Alternative forms

For euphony, ad- can assimilate the attached stem's initial consonant, becoming: a- (before sc, sp and st), ac- (before c and q), af- (before f), ag-, al-, ap-, ar-, as-, or at-.

Etymology

ad ‎(“towards”)

Prefix

ad-

  1. to

See also

<a class='CategoryTreeLabel CategoryTreeLabelNs14 CategoryTreeLabelCategory' href='/wiki/Category:Latin_words_prefixed_with_ad-'>Latin words prefixed with ad-</a>

Old Irish

Etymology

From Proto-Celtic *ad-, from Proto-Indo-European *ád ‎(“near, at”). Cognates include Latin ad and English at.

Prefix

ad-

  1. to, towards
  2. in many compounds, it has a purely intensive sense

Derived terms

<a class='CategoryTreeLabel CategoryTreeLabelNs14 CategoryTreeLabelCategory' href='/wiki/Category:Old_Irish_words_prefixed_with_ad-'>Old Irish words prefixed with ad-</a>

Mutation

Old Irish mutation
Radical Lenition Nasalization
ad- unchanged n-ad-
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.

References

  • “ad-” in Dictionary of the Irish Language, Royal Irish Academy, 1913–76.

Portuguese

Alternative forms

Prefix

ad-

  1. ad- (near; at)

Etymology

from the Latin prefix ad-.

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