Pewniej
Pewniej is a Polish adverb of degree that expresses a higher level of certainty or likelihood. It functions as the comparative form of the adverb pewnie (or, in some contexts, as a comparative form related to the adjective pewny), and is used to compare two assertions, scenarios, or evaluations. When someone wants to indicate that something is more certain or more probable than another option, pewniej is the natural choice.
In usage, pewniej appears in constructions that compare states of affairs, often with verbs of perception, assertion,
Form and related terms: the superlative form is najpewniej (the most certainly/most likely). The base adverb
See also: pewny, pewnie, najpewniej, bardziej prawdopodobnie.