Lewis Short
obluctātĭo (noun F) : obluctor
* A striving or struggling against, vehement opposition (eccl. Lat.): obluctatio virtutis,Arn. 2, 77: flammarum,Mart. Cap. 6, § 647: adversus mala,Lact. 3, 11, 11.—Plur.: quis obluctationes sensit?Ambros. Laps. Virg. 4, 12.
Charlton T. Lewis, Charles Short, A Latin Dictionary