Serving
Part of speech: verb
Definition: (personal) To provide a service (or, by extension, a product, especially food or drink).
Part of speech: noun
Definition: The action of the verb to serve. A portion (especially, of a meal) served to someone.
Part of speech: adjective
Definition: That or who serves or serve.
Example sentence: Your representative owes you, not his industry only, but his judgment; and he betrays instead of serving you if he sacrifices it to your opinion.
Portion
Part of speech: noun
Definition: An allocated amount.
Part of speech: verb
Definition: To divide into amounts, as for allocation to specific purposes.
Example sentence: There is that much to be done that no select or small portion of people can do; only the greater mass of the Irish nation will ensure the achievement of a Socialist Republic, and this can only be done by hard work and sacrifice.