purposeful

US /ˈpɝː.pəs.fəl/
UK /ˈpɝː.pəs.fəl/
1.

bermatlamat

showing that you know what you want to do:

:
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He has a quiet, purposeful air.
:
purposeserve a purposeaccidentally on purposeat cross purposesall-purpose flourfor all intents and purposes