Yes, those are all references to wash sales. A wash sale disallows a loss and because it is an adjustment, it is entered in column (f) with a "w" and column (g) reflects the amount of adjustment i.e. the amount of the loss that has been disallowed.
The loss that has been disallowed gets added to the cost basis of the security purchase that triggered the wash sale. To realize the loss, do not purchase the same or similar security 30 days before or 30 days after the sale.
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