Wax

Word: Wax

Part of Speech: Verb

Definition: To grow or increase 

Synonyms: Mount

Antonyms: Wane

Warning: I cannot stress enough how common this word is.  

Sentences: 

“Look, I don't want to wax philosophic, but I will say that if you're alive you've got to flap your arms and legs, you've got to jump around a lot, for life is the very opposite of death, and therefore you must at very least think noisy and colorfully, or you're not alive.”

Even though the old woman was quite surely, her grandchildren were always able to wax her kindness.

Note: The rising moon is to wax as the setting moon to wane.