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/ˈpɔɪntləsli/ · adverb
Without point; in a pointless manner; so as to lack purpose or importance..
He sat there, pointlessly tossing the ball into the air and letting it fall, over and over.
[…]as a result of which, the two scenarios in which the Harwich Force caught up with the battle while it was still going on were considered and brought forward into the main timeline, as it meant that both sides' light screening forces actually got to do something other than die pointlessly.
Use pointlessly when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pointlessly means Without point; in a pointless manner; so as to lack purpose or importance..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
He sat there, pointlessly tossing the ball into the air and letting it fall, over and over.
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