あえて
deliberately, dare to (despite a reason not to)
あえて + Verb
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あえて means doing something on purpose even though there's a reason not to: difficulty, risk, or other people's disapproval. 反対されるのを承知で、あえて本当のことを言った, "knowing I'd be opposed, I deliberately told the truth".
Compare わざわざ (N2), which is going to the trouble of doing something, often for someone else's sake. あえて is about choosing the harder or less expected path.
あえて言うなら means "if I had to say something" and softens a criticism. With a negative, あえて〜ない means "I won't go so far as to": あえて反対はしない, "I won't go out of my way to object".
It's common in speeches, interviews and essays whenever someone explains a deliberate, slightly brave choice.
Examples
反対されるのを承知で、あえて本当のことを言った。
Knowing I'd be opposed, I deliberately told the truth.
楽な道もあったが、彼はあえて厳しい道を選んだ。
There was an easy route, but he chose the hard one on purpose.
あえて言うなら、少し長すぎると思う。
If I had to say something, I'd say it's a little too long.
パソコンもあるが、あえて手で日記を書いている。
I have a computer, but I choose to write my diary by hand.
失敗を恐れず、あえて新しいことに挑戦する。
Not fearing failure, I dare to try new things.