The story
- Japanese · borrowed from臼井
- Japanese · borrowed from霊気
- English todayreiki usui
1970s', from Japanese 霊気 (reiki, literally “spiritual chi/ki”) and Japanese 臼井 (Usui, literally “mortar well, Mikao Usui Last Name”)
Words from the same roots
Japanese霊気 all →
reiki
Etymology from Wiktionary, CC BY-SA 4.0.