minimum
US /ˈmɪn.ə.məm/
UK /ˈmɪn.ə.məm/

1.
the least or smallest amount or quantity possible, attainable, or required
:
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The minimum age for voting is 18.
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We need a minimum of five people to start the game.
1.
lowest in amount, extent, or strength possible
:
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The company aims to keep costs to a minimum level.
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She made a minimum effort but still passed the exam.