definition:

inclined to start quarrels or wars

Antonym: Peaceable

Sentence: A group of bellicose patriots

Definition: hostile and aggressive.

Synonym: Hostile

Antonym: Neutral

Sentence: a bull-necked, belligerent old man

Definition: occurring or existing before a particular war, especially the American Civil War.

Synonym: Pre-war

Antonyms: Modern

Sentence: the conventions of the antebellum South

Definition: An actor event that provokes or is used to justify war.

Synonym: Challenge

Antonym: Compliment

Sentence: Venice made this action a casus belli.

Definition: a person who is widely known 

Synonym: Role Model

Antonym: Nobody

Sentence: The book is unfinished, and treats only of the first luminary, Cicero; the others intended were apparently Seneca and Pliny.

definition: producing

or seeming to produce light

definition: to

make something clear or easy to understand

Synonym: Explain

Antonym: Confuse

Sentence: work such as theirs will help to elucidate this matter.

Definition: very clear

Synonym: transparent

Antonym: Clouded

Sentence: Each of the four segment-cells gives rise by division to a small pellucid cell.

Definition:a person with whom one shares a secret or private matter, trusting them not to repeat it to others.

Synonym: Close friend

Antonym: fearful

Sentence: she was a confident, outgoing girl

Definition:

unfaithfulness

to a moral obligation

Antonym: Faithfulness

Sentence: her infidelity continued after her marriage

Definition:

the act of betraying someone or something

Synonym: Deceit

Antonym: Loyalty

Sentence: 

the perfidy of her husband

a written statement confirmed by oath or affirmation, for use as evidence in court.

Synonym: Testimony

Antonym: Blessing

Sentence:

The affidavit is certified by a notary public and confirms I personally signed the document.

the act or process of discharging undigested or waste material from a cell or organism

Synonym: Eliminate

Antonym: Accept

Sentence:

The doctor was grateful that his patient was able to rid his body of the toxic due to egestion.

blocked up with or too full of something, in particular.

Synonym:Overcrowded

Antonym: Empty

Sentence:

All the blood which had seemed congested  somewhere below his throat rushed to his face and eyes.

the process of carrying or being carried in the womb between conception and birth.

Synonym: Incubation

Antonym: decrease

Sentence: The period of gestation is sixteen weeks.

to take (something, such as food) into your body

Synonym: Swallow

Antonym: Build

Sentence: he spent his days ingesting the contents of the library