A fundamental truth or proposition serving as the foundation for a system of belief or behavior.

सिद्धांत

English Usage: She refused to compromise her principles for the sake of convenience.

Hindi Usage: उसने सुविधा के लिए अपने सिद्धांतों से समझौता करने से इनकार कर दिया।

Used to indicate a position above something or a surface that is supported by something else.

पर

English Usage: The book is on the table.

Hindi Usage: किताब मेज पर है।