noun
a floating object anchored in water to mark a location or guide navigation
verb
to keep afloat or support something or someone in order to prevent sinking or falling
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The addition of more funds will help buoy up our financial situation.
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Let's all pitch in to buoy up our friend's spirits during this tough time.
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I need some good news to buoy up my mood today.
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Positive affirmations can buoy up your confidence in challenging situations.