From The Collaborative International Dictionary of English v.0.48:
Decide \De*cide"\, v. t. [imp. & p. p. Decided; p. pr. & vb.
n. Deciding.] [L. dec[imac]dere; de- + caedere to cut, cut
off; prob. akin to E. shed, v.: cf. F. d['e]cider. Cf.
Decision.]
1. To cut off; to separate. [Obs.]
[1913 Webster]
Our seat denies us traffic here;
The sea, too near, decides us from the rest.
--Fuller.
[1913 Webster]
2. To bring to a termination, as a question, controversy,
struggle, by giving the victory to one side or party; to
render judgment concerning; to determine; to settle.
[1913 Webster]
So shall thy judgment be; thyself hast decided it.
--1 Kings xx.
40.
[1913 Webster]
The quarrel toucheth none but us alone;
Betwixt ourselves let us decide it then. --Shak.
[1913 Webster]