HinKhoj Dictionary

Criterion: The ideal in terms of which something can be judged (मानदंड/ कसौटी)
Devout: Earnest (गम्भीर/ धर्मनिष्ट)
Futility: Uselessness as a consequence of having no practical result (निरर्थकता)
Nullify: Declare invalid (रद्द करना)
Plaintiff: A person who brings an action in a court of law (अभियोगी)
Reputed: Look on as or consider (सम्मानित)

rat on (someone) - to report someone's bad behavior to someone (किसी के बुरे व्यवहार की शिकायत करना)
rat out on (someone) - to desert or betray someone (धोखा देना)
rat race - a rushed and confusing way of living that does not seem to have a purpose (जीने का एक भ्रमित करने वाला तरीका जिसका कोई उद्देश्य नहीं लगता)
smell a rat - to be suspicious of someone or something, to feel that something is wrong (किसी चीज़ और वस्तु पर संदेह करना)

If you can imagine it, you can achieve it. If you can dream it, you can become it.
आप अगर कल्पना कर सकते हैं, तो आप उसे प्राप्त कर सकते हैं। आप अगर सपना देख सकते हैं, तो आप वह बन सकते हैं।

Emblem of Royalty - Regalia
Copying someone else’s work and trying to submit as your own - Plagiarism
An imaginary society free from crimes and poverty - Utopia
A vigorous campaign for a cause - Crusade
A sentimental memory of the past - Nostalgia

at the drop of a hat - without needing any advance notice
below the belt - beyond what is fair or socially acceptable
caught with one's pants down - unprepared
buckle down - work extra hard
fit like a glove - fit perfectly (tight to one's body)