Keywords: preference, requirement, prefer, require, required, necessary, needed
As a Noun
Something that you would rather have given a choice; the choice of something instead of something else; the liking of one thing above another thing or other things. English = preference.
Something that you must have in order to do something that you want to do. English = requirement.
As a Verb or Adjective
To like one thing more than another thing or other things, and to be more likely to choose the first above the other or all the rest if there is a choice. English = prefer.
To want or need something because it is necessary or essential; to feel you must have something or someone. English = require, want badly.
To be needed because something is necessary or essential; to be needed very much. English = (be) required, (be) necessary, (be) badly needed.