Hostile (adjective): showing strong opposition, unfriendliness, or aggression toward someone or something.

“Hostile” describes an attitude, atmosphere, or action that is actively unfriendly or threatening. When someone is hostile, they’re not just cold or distant — they’re showing clear opposition, anger, or aggression. You can feel hostility in someone’s tone, body language, or words.

The word applies to people, environments, and situations. A hostile person might glare at you, speak sharply, or refuse to cooperate. A hostile environment is one where you feel unwelcome, threatened, or unable to thrive — this could be a toxic workplace, a dangerous neighbourhood, or even harsh natural conditions.

In more formal contexts, “hostile” has specific uses. A hostile takeover in business means one company tries to buy another against the target company’s wishes. Hostile territory in military terms refers to areas controlled by the enemy. A hostile witness in law is someone who becomes uncooperative or works against the side that called them.

The word carries weight — calling someone or something hostile is serious. It suggests genuine threat or aggression, not just mild unfriendliness.

Examples from the street:

• “Why are you being so hostile? I just asked a simple question” → why are you reacting with such aggression and unfriendliness?
• “The crowd turned hostile when the announcement was made” → people became angry and threatening after hearing the news
• “It’s a hostile work environment — nobody supports each other” → the workplace feels threatening and unwelcoming

2. Most Common Patterns

• hostile to / toward(s) someone → showing aggression or unfriendliness to a person
• hostile environment / atmosphere → a setting that feels threatening or unwelcoming
• hostile reaction / response → an angry or aggressive reply
• hostile takeover → acquiring a company against its management’s wishes
• become / turn / grow hostile → change from neutral to aggressive

3. Phrasal Verbs

Note: There are no common phrasal verbs directly containing “hostile” — these are related expressions often used in hostile situations:

• lash out (at someone) → attack suddenly with words or actions, often from angerExample: “He lashed out at the journalist who asked about the scandal.”
• turn on someone → suddenly become hostile or aggressive toward someone who was previously trustedExample: “The crowd turned on the politician when they discovered he had lied.”
• square up (to someone) → face someone in a confrontational, aggressive wayExample: “The two men squared up to each other outside the pub, ready to fight.”

4. Example Sentences

1. She was openly hostile toward the new manager from day one→ She showed clear unfriendliness and opposition to the new boss right from the start.
2. The interview took a hostile turn when the politician was asked about the scandal→ The conversation became tense and aggressive once the difficult topic came up.
3. Workers complained about the hostile work environment created by constant criticism→ Employees said the workplace felt threatening and unsupportive due to relentless negativity.
4. The company successfully defended itself against a hostile takeover→ The business managed to prevent another company from acquiring it against its wishes.
5. I don’t understand why he’s so hostile — I’ve never done anything to offend him→ I can’t explain his aggressive attitude because I haven’t given him any reason to dislike me.
6. The proposal received a hostile reaction from union members→ Workers responded with strong opposition and anger to the plan.
7. Negotiations became hostile when neither side was willing to compromise→ Discussions turned aggressive once it was clear nobody would back down.
8. Troops were warned they were entering hostile territory→ Soldiers were told they were moving into an area controlled by the enemy.
9. The audience grew hostile after waiting two hours for the delayed show→ People became increasingly angry and aggressive as the wait continued.
10. She gave me a hostile look when I suggested we try a different approach→ She glared at me with clear displeasure when I proposed an alternative.

5. Personal Examples

1. A classroom should never feel like a hostile environment — students need to feel safe to make mistakes and learn from them→ Learning spaces must be welcoming and supportive so learners can take risks without fear.
2. Some students become hostile toward English at first because of past negative experiences, but patience and encouragement usually change that→ Learners sometimes resist the language due to bad memories from earlier education, though a supportive approach helps shift their attitude.

6. Register: Neutral to Formal

✔ Native usage tips

• “Hostile” is stronger than “unfriendly” — it suggests real aggression or threat, not just coldness
• “Hostile work environment” is a recognised legal and HR term in many countries
• “Hostile takeover” is standard business terminology you’ll hear in news and finance
• In casual speech, people might say “why are you being so hostile?” to call out someone’s aggressive behaviour

✔ Similar expressions / words

• Aggressive → ready to attack or confront; hostile often includes the emotional attitude behind aggression
• Unfriendly → cold and unwelcoming; hostile is more intense and implies active opposition
• Antagonistic → showing active opposition; slightly more formal, often used for ongoing conflict