The phrase 'ถึงขั้น (thʉ̌ng khân)' is often used in Thai to emphasize the extremity of a result caused by a particular action or situation. It is used to connect a cause and an extreme effect or result. This phrase is equivalent to expressions like 'to the extent that' or 'so much so that' in English. It can be used with a wide variety of verbs and adjectives to express severe conditions or outcomes.