"priestliest" in the adjective sense
1. priestly, hieratic, hieratical, sacerdotal
associated with the priesthood or priests
"priestly (or sacerdotal) vestments"
"hieratic gestures"
2. priestly, priestlike
befitting or characteristic of a priest or the priesthood
"priestly dedication to the people of his parish"
Source: WordNet® (An amazing lexical database of English)
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