ether

Ether has 2 syllables: e · ther.

noun. A colorless volatile highly flammable liquid formerly used as an inhalation anesthetic.

noun. A medium that was once supposed to fill all space and to support the propagation of electromagnetic waves.

noun. The fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies.

noun. Any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom.