Szilárdul

Szilárdul is a Hungarian intransitive verb meaning to become solid, to harden, or to set. It describes a change of state from a fluid, soft, or pliable condition to a firmer, more solid one. The term is used for a wide range of materials and processes, including liquids that cool and solidify, gels that set, pastes that dry, or metals and minerals that harden as they cool.

Etymology and form: The verb derives from szilárd, meaning solid, with the suffix -dul that marks a process or change of state. In standard Hungarian it is conjugated as a regular -ul/-ül verb: szilárdul (present third person), szilárdulni (infinitive).

Usage: Szilárdul appears in technical, culinary, geological, and everyday language to indicate solidification. Examples include liquids stabilizing into a solid phase, gels setting as they cure, and materials such as concrete or plaster hardening as they cure. It is often accompanied by modifiers like lassan (slowly) or hamar (quickly) to describe the rate of change. In scientific contexts it can describe crystallization, precipitation, or drying.

See also: szilárd; keményedés; fagy.