Píslovný
Píslovný is the non-diacritic spelling of the Czech and Slovak grammatical term often written as příslovný. It denotes elements that function as adverbs or adverbial modifiers in a sentence. The word is an adjective form derived from the noun for adverb, příslovce, and it is used to describe parts of a sentence that convey circumstances such as time, place, manner, or cause.
In usage, píslovný elements can be single words that behave like adverbs, or fixed phrases and clauses
The distinction between píslovný elements and related categories is primarily functional. Příslovce (adverbs) are single-word adverbial