PREP.
on
ADV.
heartily
noun
The state or quality of being perplexed.
Something that perplexes.
The Emperor, who was by then a focus of unresolvable perplexities, stood providing a strongly contrary appearance.
A measure of how well a probability distribution or model predicts a sample.
He laughed heartily at my perplexity.
I use your extension on Perplexity, that is my main search engine now.