Unapprehended, which means not caught or arrested, is an antonym for several words that signify being detected, captured, or arrested. A few words that are antonyms for unapprehended include caught, held, imprisoned, apprehended, and seized. The opposite of unapprehended suggests that the individual concerned has been held accountable for a wrongdoing, whether they have been captured by the authorities or have surrendered themselves. For example, the criminal was apprehended and charged with multiple thefts. Unapprehended, on the other hand, suggests that the individual has gotten away without facing justice for their crimes or unethical acts. The perpetrator remains unidentified and remains at large, lurking in the shadows, waiting to strike once more.