Onceinawhile : কখনোসখনো; মাঝেমাঝে; কখন-সখন; কখন কখন; বড় একটা নহে;
Related Words
once in a while  onceinawhile  See Words Also In
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Appropriate Prepositions
Authority on(বিশেষজ্ঞ পন্ডিত): Kamal was an authority on English literature.
Curse for (অভিশাপ দেয়া): If he ever mistreats my parents, I will certainly curse him for it.
Look at (তাকানো): Students look at the blackboard.
Look over (পরীক্ষা করা): He was looking over the answer scripts.
Wish for (প্রত্যাশা করা): Everybody wish for happiness.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
Fight shy of (এড়িয়ে যাওয়া): Honest boys always fight shy of bad and dishonest friends.
Irony of fate (ভাগ্যের পরিহাস): He could not succeed by irony of fate.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.