From WordNet (r) 3.0 (2006):
crystalise
v 1: make free from confusion or ambiguity; make clear; "Could
you clarify these remarks?"; "Clear up the question of who
is at fault" [syn: clear, clear up, shed light on,
crystallize, crystallise, crystalize, crystalise,
straighten out, sort out, enlighten, illuminate,
elucidate]
2: cause to form crystals or assume crystalline form;
"crystallize minerals" [syn: crystallize, crystallise,
crystalize, crystalise]
3: assume crystalline form; become crystallized [syn:
crystallize, crystalize, crystalise, effloresce]
4: cause to take on a definite and clear shape; "He tried to
crystallize his thoughts" [syn: crystallize, crystallise,
crystalise, crystalize]