solemnis
From LSJ
καὶ λέγων ὅτι Πεπλήρωται ὁ καιρὸς καὶ ἤγγικεν ἡ βασιλεία τοῦ θεοῦ· μετανοεῖτε καὶ πιστεύετε ἐν τῷ εὐαγγελίῳ → declaring “The time has been accomplished and the kingdom of God is near: start repenting and believing in the gospel!” (Μark 1:15)
Latin > English
solemnis solemne, solemnior -or -us, solemnissimus -a -um ADJ :: solemn, ceremonial, sacred, in accordance w/religion/law; traditional/customary
Latin > English (Lewis & Short)
sōlemnis: (sōlennis), sōlemnĭtas, sōlemnĭtus, v. sollenn-.
Latin > German (Georges)
sōlemnis, e, s. sollemnis.