Rock oil : পেট্রল; খনিজ তেল;
Related Words
recoil  rich soil  rock oil  rock-oil  See Words Also In
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Appropriate Prepositions
Look at (তাকানো): Students look at the blackboard.
Lost in (মগ্ন): Simon is lost in meditation.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Sentence to, for (দন্ডাদেশ দেওয়া): He was sentenced to death for murder.
Taste of (স্বাদ; অভিজ্ঞতা): They have had some taste of problems.
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Idioms
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Bad names (গালমন্দ—n) He called the man bad names.
Dead language (যে ভাষা এখন আর কথ্য নয়): Sanskrit is a rich language, but it is now a dead language.
Irony of fate (ভাগ্যের পরিহাস): He could not succeed by irony of fate.
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.