A smile seems to be a universal symbol for happy. What does "universal" mean?

What does VINDICATE mean in this context? After reviewing the evidence, the judge vindicated her, proving she wasn’t responsible for the accident.

What does ASCEND mean in this context? As the sun began to rise, the hot air balloon started to ascend higher into the sky, offering breathtaking views of the landscape below.

What does BELLIGERENT mean in this context? The belligerent student kept arguing with the teacher even after being asked to calm down.

What does the word INDIGENOUS mean in this context? The indigenous tribes of the Amazon have lived in the rainforest for thousands of years, long before modern explorers arrived.

She always felt so serene after attending yoga class. What does "serene" mean?

How is this ironic?

What does OBSCURE mean in this context? The meaning of the old poem was so obscure that even the teacher had trouble explaining it.

How is this ironic?

He thought he was right in the situation, but the teacher reminded him to try to see others' perspectives. What does "perspective" mean?

How is this ironic?

The argument between the two students escalated into a fist fight. What does escalate mean?

What does ADEQUATE mean in this context? The school provided adequate resources for students to complete their assignments, ensuring everyone had the tools they needed to succeed.