Q. I’m confused about the word neither. Is it plural or singular? How should the following sentence be written? Neither of them (likes/like) to travel. 

A. Neither is properly singular (neither A nor B is attending), but when used with a prepositional phrase that has a plural object (like “of them”), it is often made plural (neither of them like to travel). Strict grammarians would call the plural usage an error. You can read more in a dictionary, under the word neither: