ad-
(Latin: to, a direction toward, addition to, near; at; used as a prefix)
The Latin element ad carries the idea of "in the direction of" and combines with many Latin words and roots to make common English words.
Notice that the d of ad usually changes into the same letter as the first letter of the following root or word when it is a consonant: ad-fix becomes affix, and ad-sign becomes assign; therefore, making a double consonant.
Another example includes: attract is ad-tract (drawn towards); so it has a double t. On the other hand adapt is simply ad-apt, with one d. For the same reason, there is only one d in adore and adumbrate, because ad- has combined with orare and umbra.
Since these Latin words begin with vowels and not consonants, the d of ad does not double; even with other letter formats as shown previously.
ad eundem
To the same [degree].
Of equivalent value.
ad eundem; ad eund.
Of equivalent value.
ad eundem gradum
To the same degree.
Sometimes abbreviated ad eundem, this phrase may be used to place blame or praise among parties to a deed. The fuller version has a special use when applied to academic life.
Considering gradum as an academic rank, under special circumstances a person holding a Master of Arts degree from one institution may be awarded the same degree by another institution without examination or even matriculation; such a degree being termed "M.A. ad eundem gradum".
ad extra
To the outer.
In an outward direction.
ad extremum
To the extreme.
ad finem; ad fin.
To the end.
Ad finem fidelis.
Faithful to the end.
Ad finem spero.
I hope to the last.
ad finem ultimum
To the final end.
Said to be the motto of the Canadian Space Agency.
ad gloriam
To glory; for glory.
See ad maiorem dei gloriam for more information.
adglutinate
ad gustum
To one's taste.
May be found in a cookbook: "Add salt ad gustum."
ad hanc vocem; a.h.c.
At this word.
adhered
Adhered tightly to as if by suction or with glue; or stuck to an opinion, practice, or method.
adherence (ad HIR uhns)
1. A steady attachment, as of a person to a rule; fidelity, fealty, allegiance, devotion; obedience, loyalty: "The coach demanded adherence to the rules of the game."
2. Adhesion, adhesiveness, stickiness: "Put more glue on the wallpaper to increase its adherence."
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