sanctify
Pronunciation: /ˈsaŋ(k)tɪfʌɪ/
verb ( sanctifies, sanctifying, sanctified)
- set apart as or declare holy; consecrate: a small shrine was built to sanctify the site
- make legitimate or binding by a religious ceremony: their love is sanctified by the sacrament of marriage
- free from sin; purify: may God sanctify his soul
- cause to be or seem morally right or acceptable: ancient customs that are sanctified by tradition

Origin:
late Middle English: from Old French saintifier (influenced later by sanctifier), from ecclesiastical Latin sanctificare, from Latin sanctus 'holy'