priestlike

/ˈpristˌlaɪk/
adjective
  1. Resembling or characteristic of a priest, especially in being solemn, devoted, or morally authoritative.
    • The old man had a priestlike devotion to helping the poor in his community.
    • She spoke with a priestlike seriousness that commanded attention.
    • His priestlike demeanor made everyone in the room feel calm and respected.