the world > matter > constitution of matter > hardness > types of hardness > [verb (intransitive)] > become stiff or rigid (4)
intransitive. To become stiff or rigid. Also: (of liquid) to coagulate, solidify. Now Irish English (northern).
intransitive. To become stiff; (of liquid) to coagulate, solidify. Also transitive: to make stiff, thicken. Cf. stark, v. 1. Now English regional and…
intransitive. To become rigid, set, or inflexible.
intransitive. To become rigid.