The cat chased the solitary bug - it DON'T COOK the bug, though. . .it's a cat.
Alone. Unlike the other hitori (一人)、 独り has a sort of lonlely value judgement on it. Like, 'He lives by himself' or 'She had to do the whole thing herself (since no one would help her)'
unique, or a quality particular to some thing or person
autonomous - a colony becomes an independent country; a business start-up that is not under the umbrella of an established conglomerate, etc.