a) out and out b) beggar description c) look into d) sine die e) by leaps and bounds

a) Out and out (সম্পূর্ণরূপে / পাকা): He is an out and out gentleman.
b) Beggar description (বর্ণনাতীত হওয়া): The misery of the flood-affected people beggars description.
c) Look into (তদন্ত করা): The committee will look into the matter seriously.
d) Sine die (অনির্দিষ্টকালের জন্য): The university was closed sine die due to unavoidable circumstances.
e) By leaps and bounds (অতি দ্রুতগতিতে): The IT sector of Bangladesh is developing by leaps and bounds.