proficientibus
form analysis and translation based on Perseus (Version 2010):
ABL P F PRES PTC ACT | ABL P M PRES PTC ACT | ABL P N PRES PTC ACT | DAT P F PRES PTC ACT | DAT P M PRES PTC ACT | DAT P N PRES PTC ACT
proficio V  to make headway, advance, make progress, have success, profit, succeed, effect, accomplish
Georges, Ausführliches lateinisch-deutsches Handwörterbuch, 8. Aufl. (1913)
prōficio, fēcī, fectum, ere (pro u. facio), fortmachen, dah., I) vorwärts kommen, vom Flecke kommen, A) eig.: cum quinqueremis sola non proficeret, Plin. 32, 4. – B) übtr., fortschreiten, weiter kommen, Fortschritte machen, etwas, nichts u. dgl. ausrichten, gewinnen, bewirken, 1) v. Pers.: a) übh.: (show full text)
Lewis & Short, A latin dictionary (1879)
proficio, prōfĭcĭo, fēci, fectum, 3, v. n and a. [pro-facio], to go forward, advance, gain ground, make progress. Lit. (very rare): cum quinqueremis sola non proficeret, Plin. 32, 1, 1, § 4. Trop., to go on, advance, make progress; to profit, derive advantage; to perform, effect, (show full text)
Gaffiot, Dictionnaire latin-français (2016, ex 1934), merci à G. Gréco, M. De Wilde, B. Maréchal, K. Ôkubo!
proficio prōfĭcĭō, fēcī, fectum, ĕre (pro et facio), intr., 1 avancer : Ariovistum tridui viam a suis finibus profecisse Cæs. G. 1, 38, 1, [on annonça] qu'Arioviste s'était avancé à trois jours de marche des frontières de son royaume, cf. Plin. 32, 4 2 pousser, croître (show full text)
Дворецкий И.Х., Отличный латинско-русский словарь (1976)
proficio proficio, feci, fectum, ere [pro + facio] 1) идти вперёд, продвигаться, проходить (tridui viam Cs): severa lege p. Pt воспитываться в строгости; 2) (пре)успевать, достигать, добиваться (multum, nihil C, Cs etc.): p. ad (in) aliquid C, Cs etc. сделать успехи в чём-л.; proficiens aegrotus (show full text)
DuCange, Glossarium mediae et infimae latinitatis (1883-7)
PROFICIO, (PROFICERE) pro Proficisci, apud Erchempert. Histor. Langob. cap. 59. et in Chron. Salernit. cap. 107. Pertz. Scriptor. tom. 3. pag. 258. lin. 48. in var. lect. pag. 523. lin. 7.