Verb ます-stem + がたい

[Hard to ~; Difficult to ~ (emotionally/psychologically)]

Connection: Verb ます-stem + がたい

Usage: Expresses that something is difficult to do, especially from an emotional or psychological standpoint. More formal than にくい, and implies near-impossibility.

Common combinations: 信じがたい (hard to believe), 許しがたい (hard to forgive), 理解しがたい (hard to understand), 耐えがたい (hard to endure), 得がたい (hard to obtain)

Difference from にくい: にくい is physical/practical difficulty; がたい is emotional/psychological.

Examples:

信じがたい話だが、本当だ。(It's a hard-to-believe story, but it's true.)

彼の行動は理解しがたい。(His behavior is hard to understand.)

忘れがたい思い出になった。(It became an unforgettable memory.)