CRYSTALLISE
crystallize, crystallise, crystalise, crystalize
(verb) cause to take on a definite and clear shape; “He tried to crystallize his thoughts”
crystallize, crystallise, crystalize, crystalise
(verb) cause to form crystals or assume crystalline form; “crystallize minerals”
clear, clear up, shed light on, crystallize, crystallise, crystalize, crystalise, straighten out, sort out, enlighten, illuminate, elucidate
(verb) make free from confusion or ambiguity; make clear; “Could you clarify these remarks?”; “Clear up the question of who is at fault”
Source: WordNet® 3.1
Verb
crystallise (third-person singular simple present crystallises, present participle crystallising, simple past and past participle crystallised)
Non-Oxford British standard spelling of crystallize.
Source: Wiktionary