Choose the most appropriate ANTONYM of the given word.

RUDIMENTARY

Intricate 

The most appropriate antonym of the word rudimentary is intricate.

• Rudimentary means "basic or elementary; not yet fully developed or complex."
• Intricate means "having a complex and detailed structure or pattern."

The other words do not have the same meaning as intricate.

• Encourage means "to give someone support, confidence, or hope."
• Displease means "to make someone unhappy or dissatisfied."
• Unquenchable means "impossible to extinguish or satisfy."