The term "chisel in" can be replaced with various synonyms such as interrupt, interfere, butt in, assert oneself, or intrude. Interrupting a conversation in the middle of it or interfering in someone else's work may not be much appreciated, and butt in or intrude can have even more negative connotations. However, some situations may require one to assert themselves or chisel in to be heard or to address an urgent matter. It is often useful to have alternatives to choose from, depending on the context and tone of the conversation. So, if you need to express that someone interrupted you, you can use the phrase "chiseled in," or you could use one of these synonyms to communicate the same message effectively.