Mrs Frisby and the Rats of NIMH by Robert C. O'Brian Vocabulary

the choicest or most vital part of some idea or experience

a journey organized for a particular purpose

proceed somewhere despite the risk of possible dangers

a cylinder of calcium carbonate projecting from a cave floor

in such a manner as could not be otherwise

a courteous expression of esteem or regard

a person employed to keep watch for some anticipated event

move in order to make room for someone or something

a medical device to immobilize and protect a body part

an addition that was not included in the original plan

an instance that does not conform to a rule

luggage consisting of a small case with a flat bottom

search the bottom of a body of water for something valuable

precisely and clearly expressed or readily observable

a group of organisms of the same type living together

unaffected by concern for one's own welfare

provide furniture with comfortable padding or covers