Final answer:
The act of section 18 wounding with intent is the intentional infliction of grievous bodily harm and represents a serious criminal offense that requires a deliberate action to cause significant injury to another person.
Step-by-step explanation:
The act of section 18 wounding with intent falls under the legal domain, specifically criminal law in some jurisdictions. This offense is described as the intentional infliction of grievous bodily harm, which means that for someone to be found guilty under section 18, it must be proven that they deliberately and willfully caused significant injury to another person. It is considered a more severe crime compared to section 20 wounding, as section 18 involves a specific intent to do grievous bodily harm or to resist or prevent the lawful apprehension of any person.