Perusteellisilla

Perusteellisilla is a Finnish adjective meaning thorough, fundamental, or comprehensive. It is the adessive plural form of the word "perusteellinen". When used, it implies that something has been done with great care, attention to detail, and a deep understanding of the underlying principles. For example, a "perusteellisilla tutkimuksilla" would refer to research conducted thoroughly, examining all relevant aspects. Similarly, "perusteellisilla muutoksilla" would indicate fundamental or sweeping changes. The term is often employed in contexts requiring a high degree of diligence and completeness, such as in academic, scientific, or investigative work. It suggests a process that has not been superficial but rather has delved into the core elements of a subject. The adessive case ("-lla/-llä") indicates the means or instrument by which something is done, so "perusteellisilla" modifies a noun to show that the action was performed using thorough methods.