earnest

US /ˈɜ:rnɪst/

UK /ˈɜ:nɪst/

B2TOEIC
adj.AdjectiveSerious; determined; not light-hearted
She is the most earnest young woman that I've ever met
n. (c./u.)Noun (Countable/Uncountable)A sum of money paid as a deposit to bind a contract.
He put down an earnest on the house to show his serious intent to buy.

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