lujittunut

Lujittunut is a Finnish adjective describing something that has undergone the process of hardening or stiffening and thereby has increased rigidity or strength. It is formed as the past participle of the verb lujittaa, which means to harden, strengthen, or fortify. The term is used in formal or technical texts to characterize materials, substances, or structures that have gained rigidity through processes such as drying, curing, cooling, or compression.

Common contexts include construction, geology, and materials science. In concrete work, for example, betonii on lujittunut after the curing period and has reached a substantial portion of its final strength. In geotechnical descriptions, maaperä can be lujittunut or tiivistynyt as a result of compaction and loading. The term can also appear in metallurgy and process engineering to indicate that a material has become harder or more resistant through heat treatment or chemical processing.

Usage notes: lujittunut is a neutral, descriptive term suitable for reporting states rather than actions. It conveys that the material’s properties, such as stiffness or strength, have increased relative to an earlier state. The sense is closely related to, but not identical with, kovettuminen (hardening) and tiivistyminen (compaction).

See also: kovettuminen, tiivistyminen, kestävyys, lujuus.