"Laid a finger on" is an idiom that means to touch someone or something with the intention of causing harm or damage. There are several synonyms for this phrase, including "touched aggressively," "assaulted," "manhandled," "victimized," "abused," "maltreated," "mistreated," "hurt," and "harmed." These words convey a sense of physical violence or aggression and can be used to describe any situation where someone has intentionally caused harm. If you want to describe such an incident in your writing, these synonyms for "laid a finger on" can be useful tools to communicate your idea more effectively.