σεμνύνεσθαι
From LSJ
δεξιὸν εἰς ὑπόδημα, ἀριστερὸν εἰς ποδάνιπτρα → the right foot into a shoe, the left into a foot-bath | of one who is ready for anything
Greek > English (Woodhouse Verbs Reversed)
(see also σεμνύνω): be arrogant, be pompous, be solemn, give oneself airs, stand on ceremony