SHREWD

[adjective] [+ to infinitive] -er, -est approving - possessing or based on clear understanding and good judgment of a situation, resulting in an advantageHe was shrewd enough not to take the job when there was the possibility of getting a better one a few months later.It was shrewd of you to make that investment.She is a shrewd politician who wants to avoid offending the electorate unnecessarily.She has a reputation for shrewd management decisions.It was a shrewd move to buy your house just before property prices started to rise.She has a shrewd eye for publicity and rarely misses an opportunity to appear in the media.