What is the Latin word for deeply?

The usual Latin words for “deeply” are altus, profundus, penitus; also valdē, vehemēns, ā̆stūtus. The right choice depends on the sense; see the distinctions below.

English → Latin

“deeply” in Latin

altusold, ancient, long gone; high-born, lofty, noble; high-minded, magnanimous, great profundusdeep, profound; intense, extreme, profound; immoderate; boundless, vast; bottomless penitusinner, inward valdēvery, very much, exceedingly; strongly, vigorously, intensely vehemēnsvery eager; impetuous, ardent, furious; vehement; emphatic ā̆stūtuscrafty, cunning, shrewd, clever, tricksy (adept at using tricks)calliduswise, clever, ingenious; adroit, skilful, cunning, sly, crafty; discreet versūtusadroit, dexterous, versatile; shrewd, clever, crafty, ingenious; wily, cunning, sly vafersly, cunning, crafty, artful, subtle subdoluscrafty, cunning, sly, subtle

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

deeply

alte; profunde; penitus (inwardly): valde; vehementer (e.g., to feel pain or affliction): deeply affticted, graviter afflictus; moerore profligatus (Cic.): deeply-rooted, altis radicibus defixus (PROP. and figuratively; e.g., virtus, Cic.); inveteratus (figuratively, of habits, hatred, etc.): very deeply rooted, altissimis defixa radicibus (e.g., virtus, Cic.): deeply rooted in anybody, penitus defixus in aliquo (e.g., fault): a deeply-rooted opinion, opinio penitus insita: deeply-rooted evils, mala inveterata, fixa (Cic.): to be deeply-rooted, altas radices agere (PROP.); inveterascere (figuratively, of habits, etc., ): to be very deeply rooted, penitus immissis radicibus niti (Quint., 1, 3, figuratively). More under DEEP. To impress deeply on one’s heart, animo suo penitus mandare aliquid.

Cunningly, astute; callide; versute; vafre; subdole.

Profoundly, subtiliter: abscondite (e.g., disserere).

Quick answer

What is the Latin word for deeply?: The usual Latin words for “deeply” are altus, profundus, penitus; also valdē, vehemēns, ā̆stūtus. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.