Substitute most appropriate word for following from the given options:
whose meaning is difficult to understand

abstruse

The most appropriate word for whose meaning is difficult to understand is abstruse.

• Effeminate means having qualities or an appearance traditionally associated with women.
• Benevolence means the desire to do good to others.
• Psychiatrist is a doctor who specializes in the diagnosis and treatment of mental disorders.
• Abstruse means difficult to understand or comprehend.