IPA: /ˈɛrəntli/
KK: /ˈɛrəntli/
In a way that is mistaken or incorrect; deviating from what is right or true.
He errantly believed that he had won the lottery.
Errantly → It is formed from "errant" (from Old French *errant*, meaning wandering or straying) and the suffix "-ly" (meaning in a manner of). The word "errantly" means in a manner that is wandering or straying from the correct path.
Think of someone acting in a 'wandering' way ('errant') — the '-ly' just means in that manner. This helps you remember that 'errantly' means doing something in a wandering or straying manner.