Toughen : কঠিন করা বা হওয়া;
Related Words
tegmen  thesun  token  toucan  touch on  toughen  See Words Also In
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Appropriate Prepositions
Abide by(মেনে চলা): We must abide by the rules of discipline.
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Bare of(অনাবৃত, স্বল্প-সজ্জা): The trees of the forest are bare of leaves.
Compete with(প্রতিযোগিতা করা): He does not pke to compete with
Fantasize about (কল্পনা করা): They fantasized about winning the lottery.
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Idioms
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
At the latest (খুব বেশি দেরী হলে) He will arrive here at 5 p. m. at the latest.
Bring to light (disclose-প্রকাশ করা) The police brought the secret to light.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
Take to one's heels (to run away, পালানো)- They took to their heels when they saw the policeman approaching.