なさそう negative (looks like そうです)
文法の解説は英語です。
用法
(いA い->-く/な~~だ~~->では(じゃ)/N~~だ~~->では(じゃ)) なさそう The negative form of そうだ (looks like そうです) Indicates something does not appear to be A or is not thought to be A
例文
あの映画はあまり面白くなさそうですね
That film doesn't look very interesting, does it?
この機会はそんなに複雑じゃなさそうです
This machine does not look that complicated