Staunch(adjective)
Always showing strong support in your opinions and attitude.
Hindi meaning:कट्टर
Synonyms: Faithful, Reliable, Loyal, Trusty
Antonyms: Unreliable, Weak, Unfaithful, Untrustworthy
Example: He is one of the president’s staunchest allies.
Trick to remember: Staunch log apne opinions pr aanch nhi aane dete. 
