petollisesti

Petollisesti is a Finnish adverb meaning "deceptively" or "treacherously." It describes actions, statements, or situations that involve deceit or misrepresentation. The word is the adverbial form of the adjective petollinen, which means "deceptive" or "fraudulent."

It is formed by adding the suffix -sti to the adjective petollinen, following standard Finnish derivational patterns for adverbs (e.g., nopeasti from nopea). The semantic field centers on deliberate deception and manipulation. The related noun petos denotes deceit or fraud, linking petollinen and petollisesti to broader concepts of dishonesty.

Usage: Petollisesti is used in formal and journalistic Finnish to condemn deceptive practices, but can appear in literary or descriptive contexts as well. It generally implies intentional misrepresentation rather than a simple mistake. Examples: "Yritys markkinoi tuotetta petollisesti." "Hän lupasi tukea, mutta toimi petollisesti."

Related terms include petollinen (deceptive), vilpillinen (dishonest), huijaus (fraud/cheating). See also: petos (deceit), petollisuus (deceitfulness).