Formidable(adjective)
you feel fear and/or respect for them, because they are impressive or powerful
Hindi meaning:दुर्जेय
Synonyms: Mighty, terrific, tremendous, strong
Antonyms: Weak, feeble, harmless, easy
Example: All reformations seem formidable before they are attempted.
Trick to remember: principal ke office me jana formidable tha 
