n. the act of solving a problem, question, etc.

v. to overcome completely in mind or feeling.

 adj. having and using knowledge and skill.

adj. expressing agreement or consent.

n. an act of noting a fact for a scientific purpose.

n. a mere assumption or guess.

n. surrounding objects, conditions, or influences; environment.

n. a drain or channel crossing under a road, sidewalk, etc.; sewer; conduit

adj. made certain as to truth, accuracy, validity

n. a person who is an expert in zoology or botany.

n. a person who is an expert in zoology or botany.

n. the introduction of harmful substances or products into the environment.

n. the natural environment of an organism

adj. hopeless; leaving little or no hope.

n. location or position with reference to environment.

v. at a loss; confused; perplexed.

adj.  relating to archives or valuable records or documents.

n. process as a method of studying the nature of something.

v. a sampling, or partial collection, of facts, figures, or opinions.

v. to depress or reduce a person's ego, hopes, spirits.

adj. of unknown name; whose name is withheld.

v. to keep from falling, sinking, etc.

adj. Chemistry, of or noting one or more elements.