WAX = 1. to grow larger or more intense; 2. to take on a state or quality
Synonyms:
grow, increase, expand, broaden, intensify, become
Antonyms:
wane
Examples:
- I sat on the shore and watched the waves wax and wane.
- My friend started to wax philosophical after a couple glasses of wine.
- As the moon waxes toward its full state, it becomes rounder each day.
- Milton Friedman waxed eloquent on the subject of free enterprise.

- I am always captivated to see Carl Sagan waxed eloquent about the Cosmos. aThe Cosmos is all that has ever been, all that is, and all that ever will be.a

TREPIDATION =

a feeling of fear or dread about the future
Synonyms:
alarm, fear, agitation, perturbation, uneasiness, consternation, dread
Antonyms:
ease, calm
Examples:
- Francis’s trepidation about having to deliver a speech to the company board
was evident on her face as a small bead of sweat ran down her forehead.

- Bill’s trepidation about being fired seemed unwarranted, since he was a top performer for the company.
- It was John’s trepidation about flying that caused him to cancel her European vacation.
- I have some trepidation about starting a new job, but once I get past my fear, I’m sure everything will be fine.