An adverb meaning 'too much' or 'excessively', used to indicate a very strong degree.
あまりにも疲れていたので、すぐに寝てしまった。
I was so exhausted that I fell asleep immediately.
その映画はあまりにも悲しくて最後まで見られなかった。
The movie was too sad; I couldn't watch it to the end.
あまりにも簡単に見えるが、実は難しい問題だ。
It looks too simple, but in fact it's a difficult problem.
彼の言い方はあまりにも直接的で、相手を傷つけることがある。
His way of speaking is excessively direct and can sometimes hurt people.