Sometimes Jacobus Primus (moniker of Y-H-B’s older brother Jacob [b. 1928]) comes up with a word in conversation that is eminently apposite but rarely heard these days in ordinary speech. Such is the adjective punctilious, defined by the OED as follows:

Strictly observant of or insistent on fine points of procedure, etiquette, or conduct; extremely or excessively particular or correct. Also: characterized by such scrupulous attention to detail or formality.

Here is its pedigree:

Origin: A borrowing from French, combined with English elements; modelled on a French lexical item. Etymons: punctilio, n., -ous suffix, French pontilleux.
Etymology: < punctilio n. + -ous suffix, after French pointilleux (a1608; c1580 in Middle French as pontilleux). Compare Italian puntiglioso (1618)

Jacobus mentioned this word the other day (inter alia) because he can be said to embody its meaning in his own attitude and behavior. Once again, Aristotle was right when he averred that action is the overt embodiment of character. Q. E. D.