堪らない

1. Origins, structure, and basic meaning

• Structure: The written form is 堪らない, read たまらない. This negative form of an expression for bearing something can mean literally unbearable or emotionally irresistible.
• Basic usage: 暑くて堪らない says unpleasant heat is hard to bear, while 人には堪らない gives the opposite evaluative force: irresistible to someone who likes it.

2. Common pitfalls and similar expressions

• Unbearable discomfort
  • This is the direct negative sense of being unable to bear a hot room in midsummer. Example: 真夏の部屋は暑くて堪らない。 — The room is unbearably hot in midsummer.
• Intense positive appeal
  • Despite the negative form, it need not express dislike; a favored aroma can be irresistible. Example: 焼きたてのパンの香りが好きな人には堪らない。 — The smell of freshly baked bread is irresistible to anyone who loves it.