Perusteellisesti

Perusteellisesti is a Finnish adverb meaning “thoroughly” or “in a thorough manner.” It describes performing an action with careful attention to detail, breadth, and accuracy, typically addressing multiple aspects and ensuring that the treatment is complete rather than cursory.

Etymology: The word derives from peruste (basis, foundation) and the adjective perusteellinen (thorough). The adverbial suffix -isesti forms perusteellisesti, yielding the sense "in a thorough manner."

Usage: The term is common in formal writing, research, journalism, and technical documentation. Examples include: Tutkija tutki aiheen perusteellisesti; Raportti käsittelee tutkimuskysymykset perusteellisesti; Esitys laadittiin perusteellisesti ja selkeästi.

Nuance: Perusteellisesti implies a systematic, often time-consuming approach and is associated with rigor and reliability. It does not inherently express value judgments, but it signals thoroughness and credibility.

Related terms: Huolellisesti is a near synonym meaning “carefully”; pinnallisesti means “superficially” and is opposed in meaning. Syvällisesti means “in depth,” which overlaps with thoroughness but emphasizes depth of understanding rather than procedural completeness.