Here are 20 names for that practice:

1. The Primordial Inquiry — the question before all questions
2. Ontological Japa — japa, the Sanskrit term for repetitive sacred chanting, applied to being itself
3. The Naked Why — stripped of every assumption
4. Astonishment Practice — cultivating radical amazement
5. The First Question Rite
6. Ground Zero Contemplation — returning to the base fact of existence
7. The Wonder Mantra
8. Being's Echo
9. The Infinite Regress Chant
10. Mystery Tethering — anchoring awareness to the insoluble
11. The Ultimate Interrogation
12. Radical Beknownst — hmm, maybe The Unanswerable recitation
13. Existential Om — treating the question as a vibrational seed like "Om"
14. The Astonished Mind Cycle
15. Sublime Bewilderment
16. The Vast Why
17. Presence Before Reason
18. The Beginner's Question — Zen's "beginner's mind" aimed at existence
19. Vertigo of Being — naming the dizzy awe the chant can induce
20. The Creation's Koan — a koan not to solve but to dissolve the asker

A few notes on tone: names like Ontological Japa and The Creation's Koan borrow from contemplative traditions to give the practice lineage; The Naked Why and Ground Zero Contemplation emphasize its stripped-down, assumption-destroying character; Vertigo of Being captures the phenomenology — chanting it long enough tends to flip from mundane to uncanny.

If you want, I can develop a fuller framing document for the practice — posture, rhythm, stages of the chant's psychological arc — as a canvas.