σείω
I. "to shake, move to and fro", Hom.; σε. ἔγχος, μελίην "to shake the poised" spear, Il.; κάρα σει., in sign of discontent, Soph.:—also, σείειν τῆι οὐρᾶι Xen.
2. of earthquakes, which were attributed to Poseidon, Hdt.; absol., σείσας "by an earthquake", Ar.: impers., σείει "there is an earthquake", Thuc., Xen.
3. metaph. "to shake, agitate, disturb", Pind., Soph.
4. in attic, "to accuse falsely or spitefully", so as to extort hush-money, Ar.; cf. Lat. concutio.
II. Pass. "to shake, heave, quake", of the earth, Il., Hdt.:—metaph. "to be shaken to its foundation", τὸ τερπνὸν πίτνει σεσεισμένον Pind.; οἷς ἂν σεισθῆι θεόθεν δόμος Soph.
2. generally, "to move to and fro", Il.: Pass., ὀδόντες ἐσείοντο his teeth "were loosened", Hdt.; σεισθῆναι σάλωι Eur.
III. Mid. "to shake" something "of one's own", Theocr., Anth.
2. like Pass. "to shake oneself, to shake", Il.