sided
Webster's Dictionary (GCIDE)
1.To lean on one side. [Obs.] --Bacon. [1913 Webster]
2.To embrace the opinions of one party, or engage in its interest, in opposition to another party; to take sides; as, to side with the ministerial party. [1913 Webster]
All side in parties, and begin the attack.— Pope.[1913 Webster]
Sided \Sid"ed\, a. Having (such or so many) sides; -- used in composition; as, one-sided; many-sided. [1913 Webster]