योग-भट्ठी yōg-bhaṭṭhī

भट्ठी bhaṭṭhī (hindi)

Fire-place, grate, stove, oven, forge, furnace, kiln, alembic, still, washerman's boiler or copper, distillery.
(Bābā) Collective intensive meditation for a few hours (furnace).

योग yōg (sanskrit)

Connection, union.
Combination; conjuncture (as of heavenly bodies); agreement, similarity.
Yoga, a theory or practice of abstract meditation undertaken to bring the soul towards or into union with the supreme spirit; bodily exercises or disciplines, as conducive to the above.
(Bābā) Union in remembrance (especially with the Father).