Select the most appropriate ANTONYM for the given word.
Spiritual

Secular

The most appropriate antonym for the word spiritual is secular.

• Spiritual means relating to or affecting the human spirit or soul as opposed to material or physical things.
• Secular means not religious or sacred; concerned with worldly matters rather than religious ones.

The other words do not have the same meaning as spiritual and are therefore not antonyms.

• Insubstantial means not having much substance or reality; lacking solidity or tangibility.
• Ethereal means delicate, light, and airy; having an otherworldly quality.
• Immaterial means not having physical or tangible existence; not important or significant.