To manipulate means to control or influence someone or something in a clever, skillful, or sometimes dishonest way.

When you manipulate physical objects, you're handling them with skill and precision. A surgeon manipulates delicate instruments during an operation. A potter manipulates clay on a spinning wheel to shape a bowl. Scientists manipulate variables in experiments to see what happens. This kind of manipulation is neutral: it's about skillful control.

But when you manipulate people, the word takes on a darker meaning. A manipulative person might twist the truth, play on someone's emotions, or arrange situations to get what they want without being direct about it. Imagine a student who pretends to be sick to avoid a test, or someone who makes a friend feel guilty to get their way. They're manipulating: using indirect methods to control a situation or person.

The key difference is honesty and respect. Persuading someone with good reasons respects their ability to decide. Manipulating them means you're trying to control their decision without them realizing it. A manipulator might say, “If you were really my friend, you'd do this for me,” making you feel bad instead of simply asking directly and accepting whatever answer you give.

Manipulating people always involves some element of deception or unfair influence, which is why calling someone manipulative is a serious criticism of their character.