objurgate (v.)

late 14c., "morally upright, righteous in the eyes of God" ("Now chiefly as a Biblical archaism" - OED, 1989); also "equitable, fair, impartial in one's dealings;" also "fitting, proper, conforming to standards or rules;" also "justifiable, reasonable;" from Old French juste "just, righteous; sincere" (12c.) and directly from Latin iustus "upright, righteous, equitable; in accordance with law, lawful; true, proper; perfect, complete" (source also of Spanish and Portuguese justo, Italian giusto). This is from ius "a right," especially "legal right, law" (see jurist; from Latin ius also come English jury (n.), injury, etc.).

It is attested from c. 1400 as "right-minded, good in intention;" from early 15c. as "legal, lawful, right in law." Also "exact, precise; marked or characterized by precision; having correct dimensions" (late 14c.); of narrations, calculations, etc., "accurate, correct" (early 15c.). The sense in music, "harmonically pure, correct, and exact" is by 1850.

The more mundane Latin law-word lex covered specific laws as opposed to the body of laws. The noun meaning "righteous person or persons; Christ" is from late 14c. (The neuter adjective in Latin was used as a noun, iustum, "what is right or just").

c. 1500, objurgacioun, "act of scolding or rebuking," from Old French objurgacion (15c.) and directly from Latin obiurgationem (nominative obiurgatio) "a chiding, reproving, reproof," noun of action from past-participle stem of obiurgare (see objurgate). Related: Objurgate; objurgative; objurgatory.