Reason  /ˈriːz(ə)n/  

Noun, Verb

Synonyms: Philosophy, rationale, cause, understanding, justification
Antonyms: Insanity, craziness

Hindi: कारण
Punjabi: ਕਾਰਨ

Meaning:

1. A cause, explanation, or justification for an action or event.

2. The power of the mind to think, understand and form judgments logically.

3. think, understand, and form judgments logically.

Plural noun: Reasons

Verb forms: Reason, Reasoned, Reasoned.

Sentence:

Ravinder had no reason to worry.