Neither is versatile, and can be used as a pronoun, (" Neither of your ideas works"), or an adjective (" Neither plan can be used"). It can also be used as a conjunction, in which case it is usually paired with "nor" ("We can use neither your first suggestion nor your second one").
You use neither in front of the first of two or more words or expressions when you are linking two or more things which are not true or do not happen. The other thing is introduced by 'nor'. Professor Hisamatsu spoke neither English nor German. The play is neither as funny nor as disturbing as Tabori thinks it is.