IPA: /əˈɡwɪʃli/
KK: /əˈɡwiʃli/
In a way that shows or expresses great pain or suffering.
She looked at him aguishly, her face contorted in pain.
The word 'aguishly' originates from the word 'ague' (from Old French *agu*, meaning fever or chill) combined with the suffix '-ishly' (meaning in a manner of). The term describes something done in a manner that is reminiscent of or related to the symptoms of ague, such as shivering or feeling cold.
Think of 'ague' as a reference to feeling feverish or chilly, and remember that 'aguishly' means doing something in a way that reflects those symptoms.