The Hierophant*, numbered V (this is five in Roman Numerals), is the card of translating the Word of God into daily living, the outward expression of faith, hope, and trust, with a little bit of pixie dust. The teacher, the elder, the guru, the reverend, the seer. This is the card of honesty and integrity, ethics and love eternal; learning and studying spiritual truths to live life with more grace and ease, with more compassion and understanding.
If the Hierophant is in the obstacle position of a spread then it indicates that you are giving away all your power to a "higher authority" which robs you of being able to be the Hierophant of your own life; doubting yourself to the point where you are gaslighting yourself, shutting yourself off from your own way of expressing heavenly compassionate living. It's a terrible way to live.
If the Hierophant is in the solution position then it likely indicates a need to seek out a trusted spiritual advisor and/or sacred text. It's also a call to trust yourself to know who that person is, and when to let go of continuing to trust someone/something in authority that makes you uncomfortable. Do what works for you with honor and fairness. Personal sacred ritual is needed here.
*The Hierophant is pronounced high-roh-fant (like ant and hieroglyphics)