from Wiktionary, Creative Commons Attribution/Share-Alike License.
Sorry, no etymologies found.
But Suarez and later writers complete the argument by analyzing the term _movens non motum_, which they consider equivalent to _Ens a se, in se, et per se_, or _Actus Purissimus_.
[Footnote 86: This tense is formed from the Past Def. by changing the termination _ron_ of the 3rd pers.pl. into _se, ses, se, semos, seis sen_, in all the three conjugations.]
Pitman's Commercial Spanish Grammar (2nd ed.) C. A. Toledano
The hybrids are divided into su, se, se+, and sh2 types.
chron.com Chronicle 2010
Se puede ser mongolo, se puede ser gilipollas, pero … ¿se puede ser original?
“_La graderia_ (del monumento sepolcrale) _se hallaba practicada en el costade occidental per donde se subia para_ ORAR, _o para_
It may be that electricity is an _entity per se, just as matter is an entity per se_. "
Aether and Gravitation William George Hooper
But Le Sage supposed that every one addressed as señor, might also be spoken of by the term señoria; a mistake against which a very moderate knowledge of Spanish usages would have guarded him.
Malum in se is Latin for "evil in itself", not "wrong in itself" HUGE difference.
Anyway .... the "se lo" occurs when the result would normally be "le lo (la)" -- which sounds awkward to the Spanish ear, so "se" is substituted for "le":
That closing the funding gap per se is not the difficult or serious problem facing SS can be seen from the fact that big funding gaps in SS have been closed * repeatedly* since the 1940s with no serious problem by raising taxes and (later) cutting benefits.