An Etymological Dictionary of Astronomy and Astrophysics

1. A serious disagreement or argument, typically a protracted one.
   

2. A serious incompatibility between two or more opinions, principles, or interests (Oxford.Dictionaries).

Etymology (EN): M.E., from O.Fr. conflit and directly from L. conflictus,
p.p. of confligere “to strike together, be in conflict,” from → com- “together” + fligere “to strike.”

Etymology (PE): Kešmakeš, literally “pulling different ways,” from kešidan “to pull, carry, draw,” → galaxy.