Toughness : বলিষ্ঠতা; ঘন অবস্থা; দ্রঢ়িমা; কার্কশ্য; শ্রমসাধ্যতা;
Related Words
theisms  thickness  toucans  touchiness  toughening  toughens  toughness  See Words Also In
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Appropriate Prepositions
Die by (দূর্ঘটনা বা অপঘাতে মরা/কোন কিছু দ্বারা মারা যাওয়া): He died by a road accident.
Dwell in (বাস করা): He dwells in a tall apartment.
Fatigued by (ক্লান্ত): He was fatigued by hard work.
Inquire into (খতিয়ে দেখা): The police officer will inquire into the matter.
Subsist on (বেঁচে থাকা): The poor subsist mainly on rice and pulses.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Bird’s eye view - (ভাসা ভাসা দৃশ্য, হালকাভাবে দর্শন): We took a bird’s eye view of the scenery.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Now and then (মাঝে মাঝে): He comes here now and then.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.