(n.) the ability to form mental pictures or ideas of things that are not physically present:
imagination
(v.) to get better or cause to get better:
improve
(n.) a component of a machine or device:
part
(n.) an original or first version of something from which other versions are developed:
prototype
(n.) a procedure to find out information about something:
test
(v.) — to give a test or check:
test
(adj.) beneficial:
useful
