Whereat : যাহাতে;
Related Words
whart  where to  whereat  whereto  wherewith  wraith  wrath  wreath  wreathe  See Words Also In
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Appropriate Prepositions
Contemporary of (সমসাময়িক): William Wordsworth was a contemporary for greater efficiency.
Dedicate to (উৎসর্গ করা): His pfe is dedicated to the welfare of the country.
Fond of (প্রিয়/অনুরাগী): Children are fond of sweets.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Play with (খেলা করা/ মজা করা): I shall not play with him.
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Idioms
Bring to light (disclose-প্রকাশ করা) The police brought the secret to light.
Dead of night (মধ্যরাত্রি): The robbers broke into the house at dead of night.
Maiden speech (প্রথম বক্তৃতা): His maiden speech fell flat on the audience.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.
Short temper (রগচটা)— He is a man of short temper.