'my student' is an appositive phrase — must be set off by commas on both sides.

'Inimical' = hostile/unfriendly. Antonym: 'Friendly'.

'Efface' = to erase. 'Rub out' = to erase/remove — best synonym.

Present Simple Negative passive: object becomes subject + are not liked + by us.

'The' before river names and before superlatives. 'Africa' needs no article.

'Andrea del Sarto' is a famous dramatic monologue by Robert Browning. Scholar Gipsy = Matthew Arnold.

'In case' = as a precaution against a possible future situation.

'Franchise' = right to vote or a special privilege. Best synonym: 'Privilege'.

'Sluggish' = slow/inactive. Antonym: 'Animated' = full of life.

'Humorous' is the correct spelling.

'Equivocation' = ambiguous language that can be interpreted in two contradictory ways.

'All in' = completely exhausted/very tired.

'Bill of fare' = menu — a list of available food items at a restaurant.

'Bull market' = prices rising. Opposite is 'bear market'.

'Blue chip' stocks = shares of large well-established companies — safe reliable investment.

'Razzmatazz' = noisy exciting activity or display to attract attention.

Originally 'blockbuster' = a large powerful bomb to demolish city blocks.

Ezra Pound edited T.S. Eliot's 'The Waste Land' — they were famous literary collaborators.

'Sworn in' is the phrasal verb + 'in Dhaka' is location. Both 'in' are required.

'Read between the lines' = find the hidden meaning behind what is written.