The name Aynbath is composed of two words. “Ayn–” (heb. primeval nothing; אין) deriving from the hebrew phrase אין סוף (also spelled Ayn Soph or Ain Sof) meaning “unending” and emphasizing the nonexistence of attributes in the “nameless being”.
The second part is “–bath” stemming from the old english “bæþ”, a washing or immersion of something (normally the body) in anything amorphous (e.g. water) for cleansing or medical treatment.