がたいExtremely difficult to do
がたい says that an action is extremely hard—often nearly impossible—because of psychological, moral, or conceptual resistance. It is formal and strongly associated with written evaluation and careful speech.
More than ordinary difficulty
がたい does not merely say that something takes effort. It presents the action as meeting deep resistance: the facts may be almost impossible to believe, an act morally impossible to forgive, or an idea extremely difficult to understand or imagine.
Moral and conceptual difficulty
The construction is especially natural in firm evaluations such as these.
弱い立場の人を利用する行為は、到底許しがたい。
Exploiting vulnerable people is utterly unforgivable.
AnalyzeThe difficulty here is moral, not practical.
この調査結果は、従来の理論だけでは理解しがたい。
These findings are extremely difficult to understand through the conventional theory alone.
AnalyzeThis is conceptual difficulty expressed in formal analytical language.
彼が一人でこの計画を完成させたとは、にわかには信じがたい。
It is hard to believe that he completed this project by himself.
AnalyzeChoosing among difficulty expressions
がたい presents severe psychological, moral, or conceptual difficulty in formal evaluation. にくい is the broad, neutral choice for difficulty, including practical problems. づらい is conversational and often highlights difficulty or strain personally felt by the speaker. かねる instead expresses inability or reluctance caused by one's position or circumstances, especially in careful refusals.
A lasting memory
あの日に交わした言葉は、今も忘れがたい。
The words we exchanged that day are still hard to forget.
Analyze忘れがたい often describes a powerful memory that remains emotionally significant.
More examples
この記録がすべて事実だとは、信じがたい。
It is hard to believe that this entire record is factual.
Analyze十分な説明もなく責任を他人に押しつける態度は、許しがたい。
The attitude of shifting responsibility onto others without adequate explanation is inexcusable.
Analyze当時の人々が味わった恐怖は、現代の私たちには想像しがたい。
The fear experienced by people at the time is difficult for us today to imagine.
Analyzeその現象は、現在の知識だけでは理解しがたい。
That phenomenon is extremely difficult to understand with our present knowledge alone.
Analyze彼女の演説は、聴衆にとって忘れがたいものとなった。
Her speech became something the audience would not easily forget.
Analyzeこれほど短い期間で状況が一変したことは、にわかには信じがたい。
It is hard to believe that the situation changed completely in such a short time.
Analyze