IPA: /daɪˈɜrnəli/
KK: /daɪˈɜrnəli/
In a way that occurs during the day or every day.
The flowers open diurnally, blooming each morning and closing at night.
Diurnally → It is formed from "diurnus" (meaning daily) and the suffix "-ally" (meaning in a manner). The word "diurnally" means in a daily manner or occurring every day.
Think of 'diurnus' meaning daily, and remember that 'diurnally' refers to something that happens every day.