Is there a word that describes when a word describes a thing or situation completely?
It is easy to come up with a word which is correct in a particular context, in the sense that the thing fits the definition of the word. But it's much more challenging to come up with a word that when used describes a thing entirely, in the sense that you could rely on that word alone to communicate the idea.
To put another way, what would you call it when there is a word which is sufficient to describe something to some desired level of detail?
Example sentence. "I am looking for a desired single word word for thing/situation/idea."
Ideally, this word would be specific to linguistics, rather than a generic term, like "equivalent" or "sufficient."
For a specific example, consider a definition of deceive:
(of a person) cause (someone) to believe something that is not true, typically in order to gain some personal advantage.
Now consider the definition of gaslight:
manipulate (someone) by psychological means into questioning their own sanity.
Deceive certainly doesn't seem incorrect to apply to the definition gaslight, but clearly it doesn't fully specify what gaslighting is. Another example is from a recent question, asking for a word for a specific kind of bullying, wherein a person never admits wrongdoing and insists that others are always in the wrong despite evidence to the contrary. A commenter suggested "sociopathic," which doesn't fully capture the scenario, despite it probably being an appropriate label for this sort of person.