IPA: /rɪˈɡrɛtəbli/
KK: /rɪˈɡrɛtəbli/
In a way that expresses sadness or disappointment about something that has happened or is true.
Regrettably, the event was canceled due to bad weather.
Regrettably → It is formed from "regret" (from Latin "regretare", meaning to lament or feel sorrow) and "-ably" (meaning in a manner that is). The word "regrettably" means in a manner that expresses sorrow or lamentation.
Think of feeling sorrow ('regret') and how it is expressed ('-ably'). This helps you remember that 'regrettably' means expressing sorrow.