What Does โstart in on sthโ Mean?
โStart in on sthโ means to begin criticizing, attacking, or discussing something or someone, often in a forceful or persistent way.
Introduction
The phrase start in on sth is a common phrasal verb used in English to describe beginning an action, especially when it involves criticism or persistent talking. This expression often suggests that the person is about to challenge, complain, or confront someone or something. Understanding the start in on sth meaning helps you recognize when someone is initiating a strong or repeated behavior. Itโs useful in daily conversations, especially when talking about arguments, discussions, or even starting a task with energy.
Quick Info Box
- Phrasal verb: start in on something
- Type: transitive
- Level: B2 (Upper-Intermediate)
- Short meaning: to begin criticizing or attacking someone or something
Structure (Grammar Rules)
The phrasal verb start in on is separable. This means the object (something or someone) can come either immediately after โstartโ or after โin onโ.
- start in on something
- start something in on
However, the most common and natural pattern is start in on + object.
How to Use start in on sth?
You use start in on sth when someone begins to criticize, complain about, or attack a person or topic. It often implies persistence or intensity. You can also use it when someone begins a task or discussion, but this is less common.
Examples of use include starting a complaint, a discussion, or even teasing someone. The phrase is informal and often used in spoken English.
Examples
When Sarah saw the mistake, she immediately started in on her colleague about the report.
- He started in on me for being late to the meeting.
- Donโt start in on that topic again; weโve already discussed it.
- They started in on the new project with a lot of enthusiasm.
- Mom started in on me about cleaning my room as soon as I got home.
These examples show how to use start in on sth in a sentence naturally.
Common Mistakes
People often confuse the word order or use the phrase incorrectly by leaving out parts or using incorrect prepositions.
- Incorrect: She started on in the argument.
- Correct: She started in on the argument.
- Incorrect: He started in the complaint on me.
- Correct: He started in on the complaint about me.
Remember, the phrase is always start in on, not โstart on inโ or other variations.
Differences / Synonyms
Start in on sth is similar to begin attacking, launch into, or go after. However, it usually implies a more persistent or aggressive action.
- Launch into: Focuses on beginning something energetically, not always negative.
- Go after: Often means to pursue or criticize but can be more direct.
- Start on: Can mean to begin a task or topic, but less forceful than โstart in onโ.
Use start in on when you want to emphasize the act of beginning a strong or persistent criticism or discussion.
Common Collocations
People often use start in on with words related to complaints, arguments, or tasks. Here are some common collocations:
- start in on someone โ to criticize or attack a person
- start in on a complaint โ to begin expressing dissatisfaction
- start in on a project โ to begin working on something
- start in on a discussion โ to begin debating or talking about a topic
- start in on a task โ to begin doing a job
Related Phrasal Verbs
Here are related phrasal verbs of start in on sth:
Real-life Dialogue
Imagine two friends talking after a meeting:
Anna: Did you notice how Mark started in on the new manager?
Ben: Yeah, he was really harsh about her decisions.
Anna: I think he just doesnโt like change and was quick to start in on her.
Practice
Try to complete the sentences using start in on correctly.
- When the teacher found the mistake, she __________ the student about his homework.
- Donโt __________ me about being late again.
- They __________ the new project with great excitement yesterday.
Answers:
- started in on
- start in on
- started in on
FAQ
- What does โstart in on sthโ mean? It means to begin criticizing, attacking, or discussing something persistently.
- Is โstart in onโ separable? Yes, but itโs most natural to keep the object after โin onโ.
- Can I use โstart in onโ for positive actions? Sometimes, but it usually implies criticism or persistent talking.
- Is โstart in onโ formal or informal? It is informal and common in spoken English.
- What are synonyms for โstart in on sthโ? Similar phrases include โlaunch into,โ โgo after,โ or โbegin attacking.โ

