approximative

/əˈprɑk.səˌmeɪ.tɪv/
adjective
  1. Not exact, but close enough to be useful; roughly correct or accurate.
    • The engineer gave an approximative estimate of the building's cost.
    • Her approximative translation helped us understand the main idea of the article.
    • We only need an approximative count of the people at the event.
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