Skirmishing refers to smaller conflicts, less serious than all-out battles. Despite the initial skirmishing, both sides avoided escalating the conflict.
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Metaphorical Use
It can be used metaphorically for any small-scale, brief dispute, not actual fighting. The debate started with some light skirmishing on tax policy.
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Not Physical
'Skirmishing' doesn't always imply physical confrontations; it can be verbal or ideological. The panel discussion featured a lot of skirmishing but no consensus.