Pertinacity : জেদ,দৃঢ়প্রতিজ্ঞা;
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pertaining to  pertinacity  See Words Also In
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Appropriate Prepositions
Consistent with(সামঞ্জস্যপূর্ণ): Your action is not consistent with your word.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Deaf to, of, in (না শোনা, বধির হওয়া): The boy is deaf to his father’s advice. This man is deaf of/in one ear.
Entrust with (কোনো কিছু দ্বারা কাউকে বিশ্বাস করে): He entrusted me with the thing.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
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Idioms
All at once - (হঠাৎ): I feel terribly sleepy all at once.
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Burning question - (গুরুত্বপূর্ন বিষয়): Poverty problem is a burning question of our country.
Bear hard upon (behave rudely-নির্দয়ভাবে ব্যবহার করা - V) Never bear hard upon your servants.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.