Vocabualry

Ordnance (noun): the branch of an army that procures, stores, and issues, weapons, munitions, and combat vehicles and maintains arsenals for their development and testing.
All the army supplies are procured and tested at the ordnance.
Synonym: Artillery 

Improbable:( adj) not probable; unlikely to be true or to happen.
Its improbable for me to go to work today because if feel really sick.
Synonym: Unlikely 

Reticence: (adj.) disposed to be silent or not to speak freely; reserved.
When my class gets to loud I would tell them they have to be reticence for five minutes.
The example they give on the book helped me kinda realize what it is.