latter
The German word 'später' is used to describe something that is happening or will happen at a later time. It can also be used to refer to the second of two things or people that were mentioned, similar to the English word 'latter'. However, in this context, it is more common to use the word 'letzter'.
We will eat later
In this sentence, later (später) is used to indicate a future action. In German, 'werden' is the future tense auxiliary verb, which is used along with an infinitive at the end of the sentence.
I will read the book later
In this example, the word later (später) is used to indicate when the speaker will perform the action of reading the book. The word order is a bit different in German than in English with 'lesen' (read) coming to the end of the sentence.
She will arrive later
This sentence uses later (später) to specify when she will arrive. Note that in German, the verb ('ankommen' in this case) generally comes at the end of the sentence when a modal verb (here, 'wird') is used.