The phrase "most inscribing" speaks to something that is extremely compelling, deeply moving or powerfully influential. Synonyms would include words like inspiring, unforgettable, impactful, emotional, persuasive, resonant, meaningful, moving, significant, and captivating. Any of these words could effectively capture the sense of something that makes a remarkable impression on a person, an audience, or a culture. Something that is "most inscribing" stays with someone long after they've experienced it, shaping their thoughts, feelings, and behaviors in profound ways. These synonyms capture the essence of this type of transformative, meaningful experience.