The phrase "able to block a" is correct and usable in written English.
It can be used in contexts where you are describing someone's capability to prevent or obstruct something.
Example: "The new software is able to block a variety of harmful websites to ensure user safety."
Alternatives: "capable of blocking a" or "able to prevent a".
Environmental groups have so far been able to block a retrofit of the Chevron refinery while the city has tried to raise the company's taxes.
Facebook claims to have the advantage of being able to block users, whereas you wouldn't be able to block a person if you encountered them on the street.
She hit back at comments from Nick Clegg, the former deputy prime minister, that he would use the court ruling to pursue a soft Brexit, arguing that parliamentarians should be able to block a "more self-harming, hard Brexit".
Even after the Columbine shootings, the N.R.A. was able to block a measure in 2000 to close the so-called gun-show loophole, allowing private gun sales at shows without background checks.
But they remain a vote short of being able to block a Republican filibuster, forcing them to wait for Carte Goodwin, the successor to Senator Robert C. Byrd, who died last month, to be sworn in.
But the state results suggest that the SPD may be able to block a CDU-FDP alliance and so cling to power as Ms Merkel's junior partner in a continuation of today's "grand coalition".
You might be able to block an off-licence, but supermarkets sell alcohol.
By monitoring the goals of an adversary in terms of message requests, we are able to block an adversary from receiving those messages.
Immunotherapy has demonstrated the ability to maintain durable remissions in a low percentage of patients, whereas targeted therapies are able to block an oncogenic driver and induce faster responses.
Combinations might best be assessed based on presence of demonstrable preclinical synergism across a wide range of cell lines, or based on presence of known targets for both agents, or based on a potential for the second agent being able to block an alternate growth pathway or resistance mechanism that might protect against the first agent.
It appears that VEGF-A indirectly induces lymphangiogenesis by recruiting VEGFR-1 expressing inflammatory cells including monocytes/macrophages and neutrophils that produce VEGF-C/-D because VEGFR-3 antagonists are able to block VEGF-A-induced lymphangiogenesis (Cursiefen et al, 2004).
