user131636: For example, suppose I'm selfish mining; you publish a block and then I immediately publish two, what did I do to your block?
Similarly, if I'm executing a double-spend attack, my goal is to ?___? the block containing the transaction standing in the way of my double-spend.
I'm looking for a transitive verb that also works well in passive tense.

user61002: "To override" seems fine.

user5406: I don't think there is a well-established term, yet. My spontaneous preference would be to use "to displace" or "to supersede" a block—there is only one spot in the best chain at each height and the new block took it from the old block.
In the past I have also described it as "reorganizing out" a block.

131636: <p>For example, suppose I'm selfish mining; you publish a block and then I immediately publish two, what did I do to your block?<br />
Similarly, if I'm executing a double-spend attack, my goal is to ?___? the block containing the transaction standing in the way of my double-spend.<br />
I'm looking for a transitive verb that also works well in passive tense.</p>
 61002: <p>&quot;To override&quot; seems fine.</p>
 5406: <p>I don't think there is a well-established term, yet. My spontaneous preference would be to use <em>&quot;to displace&quot;</em> or <em>&quot;to supersede&quot;</em> a block—there is only one spot in the best chain at each height and the new block took it from the old block.</p>
<p>In the past I have also described it as &quot;reorganizing out&quot; a block.</p>
