When it comes to expressing the concept of "not adapt", there exists a multitude of synonymous phrases that effectively capture the essence of being resistant, inflexible, or incompatible. Words such as "unfit", "unresponsive", and "unyielding" encapsulate the idea of lacking adjustment or being unable to conform. Similarly, "stubborn", "intransigent", and "obdurate" connote a refusal to change or adapt. Additionally, terms such as "unaccommodating", "unadaptable", and "incapable of adjustment" highlight the inability to acclimate oneself to new circumstances. Collectively, these synonyms successfully portray the notion of being unresponsive or unwilling to adapt, offering various options to precisely convey the intended meaning.