This is the 10290th most frequent Japanese word.
頓
"頓" means "sudden" or "abrupt" and can also imply "immediately" or "rapidly" depending on context.
In this sentence, '頓に' (ton ni) is used to mean 'suddenly' or 'abruptly,' emphasizing a swift or unexpected occurrence.
彼は頓に成果を上げた。
He suddenly achieved results.
Here, '頓に' carries the meaning of 'recently,' reflecting a timeframe connected to the present or recent past.
その問題については、頓に議論はしていない。
We haven't recently discussed that issue.
In this context, '頓知' (tonchi) means 'quick wit' or 'resourceful thinking,' referring to the ability to respond cleverly and effectively.