IPA: //ˈɑːrdər//
KK: /ˈɑrdər/
A strong feeling of enthusiasm or passion for something.
She approached her work with great ardour, determined to succeed.
Ardour comes from Old French 'ardeur' (meaning heat or passion), which in turn comes from Latin 'ardor' (meaning burning or fire). The word 'ardour' signifies a burning passion or intense enthusiasm.
Think of 'burning' or 'fire' to remember that 'ardour' means a strong passion or enthusiasm.