Synonym Discussion of essential. essential, fundamental, vital, cardinal mean so important as to be indispensable. essential implies belonging to the very nature of a thing and therefore being incapable of removal without destroying the thing itself or its character conflict is essential in drama.
The definition of a cretin is a very stupid person, or a person suffering from the disease cretinism, which causes mental problems and deformity. An example of a cretin is a person who constantly makes stupid and horrible mistakes. 2  An example of a cretin is someone with physical deformities due to the disease.
Cretinism is a medical condition present at birth wherein there is a decreased or absent thyroid function and thyroid hormone production [1]. When untreated, this could lead to severely stunted physical and mental growth of the newborn [2].This is also known as Congenital Hypothyroidism [3].retinism is a medical condition present at birth wherein there is a decreased or absent thyroid function and thyroid hormone production [1]. When untreated, this could lead to severely stunted physical and mental growth of the newborn [2]. This is also known as Congenital Hypothyroidism [3].