A.blow against, “πρός τι” Arist.Pr.940b34; “ἀλλήλοις” Thphr. Vent.53: impers., “ἀντιπνεῖ, διὰ τὸ ἀντιπνεῖν” Arist.Mete.370b22.
2. to be adverse or contrary, Ph.1.593, Plu.Cic.32, Luc.Nav.7: metaph. of fortune, Plb.25.3.9, Clitomachus ap. Stob.4.41.29: c. dat., Luc. Tox.7.