いや、あいつは「純」というより「鈍」って感じだな。の英語

No, I feel like he's not "pure", but rather "dull".

He is more gentle than kind.

He is more shy than timid.

Admittedly, he is lacking in sincerity, but he is an able man.

His rough appearance belies a gentle nature.

He is ruled by his intellect rather than by his emotions.

He is kind rather than gentle.

Though he looks kind, he is malicious.

He's put in the shade by his more brilliant younger brother.

This guy is really wishy-washy. He couldn't make a decision to save his life.

It is true that he is smart, but he is lacking in sincerity.

He might appear to be a little common, but in fact he's a sophisticated man.

He is gentle and a little less energetic than his brothers.

But, since he has a laid-back personality, he appears to be irresponsible.

John is brave in appearance, but is in reality a coward.

Isn't he gorgeous? - So tall and smart-looking.

Indeed he may be a little dull, but he is diligent.

He is a nice person, to be sure, but not very clever.

He seems rough, but at heart he is very gentle.

He is kind and slightly mischievous.

If it were not for his idleness, he would be a nice fellow.

He looks craggy, but he's a pussycat.

He looks stern, but actually he's very kind.

He is simple, unpretentious [unaffected] and very sincere.

So far from being robust, he was extremely weak.

They say fine words are no virtue if they're insincere and that's him in a nutshell. He's all talk but doesn't mean a word of it.

He is honest and not twisted.

He is not a cheerful guy, to say the least.

But, I think he really is a nice and serious teacher.

He may be clever, but he is not very helpful.