obfuscate
To make something confusing on purpose to hide the truth.
To obfuscate means to make something confusing or unclear on purpose, usually to hide the truth or avoid giving a straight answer. When someone obfuscates, they muddy the waters with complicated language, irrelevant details, or confusing explanations.
Imagine asking a friend if they ate the last cookie, and instead of saying yes or no, they launch into a long story about how cookies are made, why chocolate chips taste good, and whether anyone really owns a cookie anyway. They're obfuscating: deliberately making things unclear to avoid admitting they ate it.
Politicians sometimes obfuscate when asked tough questions, filling their answers with jargon and side topics instead of directly addressing what was asked. A student might obfuscate when explaining why their homework is late, offering a confusing tangle of excuses instead of the simple truth.
When you obfuscate, you're essentially fogging up the truth. The opposite is to clarify or explain clearly. Scientists and good teachers work hard not to obfuscate. They try to make complex ideas as clear and understandable as possible.