Very
Part of speech: adjective
Definition: The same; identical. mere
Part of speech: adverb
Definition: to a great extent or degree; extremely; exceedingly true, truly
Example sentence: I do the very best I know how - the very best I can; and I mean to keep on doing so until the end.
Precise
Part of speech: adjective
Definition: exact, accurateOf experimental results, consistent, clustered close together, agreeing with each other. This does not mean that they cluster near the true, correct, or accurate value.
Example sentence: The difference between a tool and a machine is not capable of very precise distinction; nor is it necessary, in a popular explanation of those terms, to limit very strictly their acceptation.