jäykkyytensä
Jäykkyytensä is the genitive form of jäykkyys, Finnish for stiffness or rigidity. It functions as a noun phrase meaning “its stiffness” or “his/her rigidity,” used to indicate that a subject possesses a certain stiffness.
Etymology and grammar: Jäykkyys is formed from jäykkä (stiff) with the nominalizing suffix -yys. The possessive
Senses and usage: The term can refer to physical properties or to more abstract forms of inflexibility.
Measurement and related terms: In engineering, stiffness is quantified by parameters such as Young’s modulus. In