to set (something) apart for a sacred purpose or for religious use
to free (somebody) from sin
to give moral, social, or religious sanction to (something)
to make or declare (something) productive of holiness or piety
Keep the sabbath day to sanctify it — Bible
sanctification /-fiʹkaysh(ə)n/ noun
sanctifier noun
[Middle English sanctifien via French from late Latin sanctificare, from Latin sanctus: see saint1]