Meaning of the word deceitfully in English

What does deceitfully mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

deceitfully

US /dɪˈsiːt.fəl.i/
UK /dɪˈsiːt.fəl.i/

Adverb

in a way that involves deceiving someone

Example:
He deceitfully claimed to be an expert.
The company deceitfully marketed its products.