friction
US /ˈfrɪk.ʃən/
UK /ˈfrɪk.ʃən/
1.
the resistance that one surface or object encounters when moving over another
:
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The car tires need good friction to grip the road.
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Applying oil reduces the friction between moving parts.
2.
conflict or animosity caused by a clash of wills, temperaments, or opinions
:
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There was a lot of friction between the two departments.
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Their differing opinions caused considerable friction.