كهْل

Translation:

Plural: كُهلان, كُهَّل, كُهول, feminine كَهْلة, feminine plural كَهَلات: An assimilated adjective denoting permanence derived from (كهُلَ): Someone whose age is between thirty and fifty, or one who has passed youth without reaching old age, or one whose hair has started turning grey, ranging from thirty-four to sixty years old. (Root: ك هـ ل)