specious

这个类比似是而非，看似有力实则薄弱。

The analogy was ___specious, appearing strong but actually weak.

这则广告声称这款面霜能一夜之间消除皱纹，纯属似是而非的宣传。

The advertisement made ___specious claims about the cream's ability to erase wrinkles overnight.

他一意识到她无法帮到自己的事业，那份虚伪的友好便瞬间消失了。

His ___specious friendliness vanished the moment he realized she could not help his career.