Meaning: If you controvert something, you raise arguments against; voice opposition to.
Controvert can mean to prove to be false or untrue.
Example: This fact alone would be sufficient to controvert your baseless assumption.
Synonyms: Contradict, Oppose, Counter, Debate, Deny
Antonyms: Agree, Affirm, Allow, Confirm, Corroborate

Meaning: Profane describes behavior that's deeply offensive because it shows a lack of respect, especially for someone's religious beliefs.
Example: Profane language is bleeped on TV.
Synonyms: Abusive, Coarse, Indecent, Obscene, Nasty
Antonyms: Decent, Clean, Nice, Respectful, Religious

Meaning: Nadir means lowest point of anything.
Example: From the zenith of hope, he had been suddenly plunged down to the nadir of despair.
Synonyms: Rock bottom, Base, Bottom, All-time low
Antonyms: Top, Zenith, Acme, Apex, Peak

Meaning: Indecorous behavior means behavior which isn't proper or socially acceptable.
Indecorous means lacking decorum, propriety or good taste etc.
Example: Indecorous behavior will not be tolerated in our school.
Synonyms: Improper, Indecent, Rude, Uncouth, Vulgar
Antonyms: Befitting, Apt, Opportune, Proper

Meaning: A taciturn person might be snobby, naturally quiet, or just shy.
The meaning of taciturn is someone who doesn't say much.
Example: An example of taciturn is a person who sits quietly at the edge of the room.
Synonyms: Implicit, Unspoken, Indirect, Silent
Antonyms: Stated, Express, Explicit