To become congealed, solidify.
To change from a liquid to solid state, perhaps due to cold; called to freeze in nontechnical usage.
To coagulate, make curdled or semi-solid such as gel or jelly.
To make rigid or immobile.
To make something loose.
To become loose.
To become less severe or tense.
To make something (such as codes and regulations) more lenient.
To calm down.
To relieve (something) from stress.
To make something less severe or tense.
To become more lenient.