Answer:

.opaque

Meaning not able to be seen through; not transparent

Synonym Nontransparent

Antonym Transparent

2.seethe

Meaning be filled with intense but unexpressed anger

Synonym be furious

Antonym annoyance

3.nimble

Meaning quick and light in movement or action; agile.

Synonym agile

Antonym clumsy

4.transparent

Meaning easy to perceive or detect

Synonym easy to detect

Antonym obscure

5.anxious

Meaning wanting something very much, typically with a feeling of unease

Synonym impatient

Antonym carefree