
Immeasurable
Scale and Scope
Use 'immeasurable' when emphasizing the vastness or boundlessness of something which cannot be quantified. 
Not Always Positive
'Immeasurable' can express negative extremes like damage or loss as well as positive ones like wealth or kindness. 
Hyperbolic Speech
In casual conversation, 'immeasurable' can be an exaggeration to show strong feeling, not always literal. 