Compos mentis

В здравом уме 

Еxplanation :

In control of one's actions, mentally healthy 

My uncle is nearly 97, but he is perfectly compos mentis. 

STATUS QUO 

Возврат к предыдущему положению 

Explanation :

The present situation 

The Democrats favoured maintaining the status quo, while the Laborists hoped for change. 

Ad infinitum (эдинфи найтем)

До бесконечности. 

Explanation : 

Without end, forever.

The list of her wishes seems to go on ad infinitum.