What is the Latin word for solemn?

The usual Latin words for “solemn” are sollemnis, gravis, sevērus; also dēierō, deus. The right choice depends on the sense; see the distinctions below.

English → Latin

“solemn” in Latin

sollemnisyearly, annual; established, appointed, fixed; common, usual, customary, ordinary, ritual, traditional gravisheavy; pregnant; troublesome, hard sevērussevere, serious, strict, stern, stringent, austere, harsh, grave (in demeanor)dēierōto swear (take an oath)deusgod, deity; the ancient Roman “Dī Penātēs,” personal or family gods of hearth and home, embodied as small statues or ico

The English word solemn itself goes back to Latin sollemnis, through sōlempnis.

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

solemn

solemnis (festive, ceremonial): gravis: severus (grave, serious). To take a solemn oath, persancte jurare or dejerare; jurare per plures (or omnes) deos.

Quick answer

What is the Latin word for solemn?: The usual Latin words for “solemn” are sollemnis, gravis, sevērus; also dēierō, deus. 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.