crystallize

Concise Oxford English Dictionary © 2008 Oxford University Press:
crystallize /ˈkrɪstəlʌɪz/ (or crystallise)

▶verb

• 1 form or cause to form crystals.

• 2 make or become definite and clear.

  ■ Finance convert or be converted from a floating charge into a fixed charge.

• 3 (as adj. crystallized) (of fruit or petals) coated and impregnated with sugar.

– derivatives
crystallizable adjective,
crystallization noun.