IPA: /ˌkæl.sɪ.fɪˈkeɪ.ʃən/
KK: /kælˌsɪfɪˈkeɪʃən/
The process or result of becoming hard or stiff due to the accumulation of calcium or calcium salts in a substance or tissue.
The calcification of the arteries can lead to serious health issues.
Calcification → It is formed from "calx" (meaning lime or calcium) and "-fication" (meaning the process of making or becoming). The word describes the process of becoming hardened or turning into calcium deposits.
Think of 'calx' which refers to lime or calcium, and remember that 'calcification' means the process of becoming hardened by calcium.