crystalise (Verb) — Make free from confusion or ambiguity; make clear.
crystalise (Verb) — (physics) cause to form crystals or assume crystalline form. ex. "crystalise minerals"
crystalise (Verb) — Assume crystalline form; become crystallized.
crystalise (Verb) — Cause to take on a definite and clear shape. ex. "He tried to crystalise his thoughts"