All 4 Uses of

inarticulate
in
Wuthering Heights

He noticed this, and thrust at an inner door with the end of his spade, intimating by an inarticulate sound that there was the place where I must go, if I changed my locality.†
p. 20.9

inarticulate = unable to express oneself clearly; or not expressed clearly

Here she burst into uncontrollable grief, and the remainder of her words were inarticulate.†
p. 63.3 *

The surprise petrified her an instant: she uttered an inarticulate exclamation, and stood fixed.†
p. 178.9

' "Get to thy own room!" he said, in a voice almost inarticulate with passion; and his face looked swelled and furious.†
p. 182.3

Definition:

unable to communicate clearly (or to use words)

or (more rarely): a feeling or idea that is not expressed

The exact meaning of inarticulate depends upon its context. For example:

unable to find good words to express oneself -- as in "She gets inarticulate when she's nervous."
verbally expressing a feeling without words -- as in "She uttered an inarticulate cry of despair."
unable to make oneself heard and understood -- as in "She mumbled inarticulately."
unable to speak -- as in "She was inarticulate with rage."
a feeling or idea that is not expressed -- as in "We shared an inarticulate fear."
inability to express or understand feelings or ideas -- as in "She is emotionally inarticulate, " or "Her symphony is inarticulate."