In this phrase, we must beware of this "ex" which does not have the same meaning as the particle joined by the hyphen to certain words to express the state or the previous position of a person: an ex - wife, an ex-deputy, an ex-CEO.
According to, in accordance with and according to
Let's take advantage of this entry to review the different meanings of ex.
In its local sense, it marks the point from which a thing comes out:
exire ex navi
, "to come out of a ship".
Read alsoDo you speak 21st century Latin?
In its temporal sense, therefore, after:
ex eo tempore
, "from this moment".
Provenance:
omnes ex Gallia naves
, “all ships from Gaul”.
The cause:
ex aera alieno commota civita
, “the city shaken by debts”.
Finally our
ex
preceding
professo
:
according to
, in
accordance
,
according to
.
Multiple uses
In 1620, this phrase began by meaning “by exhibiting doctorally”, Georges Planelles tells us.
Now let's consult the definition given by the dictionary of the French Academy of 1798 (fifth edition).
EX-PROFESSO.
adverbial phrase.
Words borrowed from Latin to say on purpose, with all the attention one owes to what one undertakes to do.
French Academy, 1798
And that of the eighth edition.
“EX-PROFESSOR.
Adverbial phrase.
Seventeenth century.
Latin phrase meaning “openly”, composed of the preposition ex and the past participle of profiteri (to declare openly).
The French meaning is explained by the influence of teacher.
As an educated man, as a man who has studied his subject
.
He talks about it ex professo.
He dealt with this matter ex professo.
“Passages in which Saint Thomas spoke ex professo of the love of charity.”
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