either
determiner, pronoun /ˈaɪðə(r)/,  /ˈiːðə(r)/
  /ˈiːðər/,  /ˈaɪðər/
- one or the other of two; it does not matter which
- You can park on either side of the street.
 - You can keep one of the photos. Either of them—whichever you like.
 - There are two types of qualification—either is acceptable.
 
Grammar Point neither / eitherneither / either- After neither and either you use a singular verb:
- Neither candidate was selected for the job.
 
 - Neither of and either of are followed by a plural noun or pronoun and a singular or plural verb. A plural verb is more informal:
- Neither of my parents speaks/speak a foreign language.
 
 - When neither… nor… or either… or… are used with two singular nouns, the verb can be singular or plural. A plural verb is more informal.
 
 - each of two
- The offices on either side were empty.
 - There's a door at either end of the corridor.
 
 
Word OriginOld English ǣgther, contracted form of ǣg(e)hwæther, of Germanic origin; ultimately related to aye and whether.