This is the 5750th most frequent Japanese word.
とことん
"とことん" means "to the very end" or "to the utmost degree."
In this sentence, 'とことん' emphasizes the extent to which he exerted effort, indicating perseverance and thoroughness.
彼はとことん努力して、ついに目標を達成しました。
He worked tirelessly and finally achieved his goal.
Here, 'とことん' implies that the discussion covered every possible aspect in detail and depth.
私たちは問題をとことんまで議論した。
We discussed the issue thoroughly to its ultimate extent.
The use of 'とことん' in this context shows complete immersion and enjoyment in the hobby.