What does either mean?
Either means Any one (of two)..
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/ˈaɪ.ðə/ · determiner
Any one (of two)..
You can have it in either colour.
There is a locomotive at either end of the train, one pulling and the other pushing.
There are roses on either side of the garden.
His flowing hair In curls on either cheek played.
Her hands, long and beautiful, lay on either side of her face.
I hope you will be ready to own publicly, whenever you shall be called to it, that by your great and frequent urgency you prevailed on me to publish a very loose and uncorrect account of my travels, with directions to hire some young gentleman of either university to put them in order, and correct the style, as my cousin Dampier did, by my advice, in his book called “A Voyage round the world.”
They entreat, they pray, they beg, they supplicate (will either of these do, Miss Clary?) that you will make no scruple to go to your uncle Antony's […].
He made me two offers, but I did not accept either.
Use either when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Either means Any one (of two)..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
You can have it in either colour.
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