Our words holy and holiness come from the  Hebrew (qadosh
and qodesh) from the Greek (hagios, hagiosyne) and the Latin
(sanctitas, sacer, sanctus). Essentially holy means what is
divine and pertains to God. It is His most intimate essence
in which He radically transcends all that is created; totally Other.
Holiness extends to whatever is in relationship with the divine;
it includes the idea of separation and opposition to what is
profane and common; it expresses the idea of belonging to
or being possessed by God.