'Repeal' = to officially cancel a law. Best synonym: 'Revoke'.

'Embezzle' = to steal money entrusted to one's care. 'Misappropriate' is the closest.

'Gracious' = courteous and kind. Antonym: 'Rude' = impolite.

'Loquacious' = very talkative. Antonym: 'Reticent' = reserved/reluctant to speak.

Machines are 'operated'. 'Handle' works but 'operate' is the most precise collocation.

'Convince someone of something' = to make them believe. 'Convinced his father of his plan.'

'Arrive at a compromise/decision/conclusion' = standard English idiom.

A knife's 'blade' is what cuts. 'Edge' refers to the sharpened side of the blade.

Imperative passive: 'Let + object + not + be + past participle'.

Passive of command (let + object + be + past participle): 'Let the door be opened.'

'One of the best players that' — relative pronoun refers to 'players' (plural) → 'have'.

'Killed himself' = reflexive. No passive needed. Simple past reflexive.

Third conditional: 'If + past perfect → would + have + past participle'. 'Would not have done'.

'Put the cart before the horse' = to do things in the wrong sequence.

'Blue blood' = aristocratic or noble descent.

'White elephant' = a costly or burdensome possession that is useless.

'Efface' = to wipe out or erase. Synonym: 'Rub out'.

'Oblivion' = the state of being forgotten. Synonym: 'Forgetfulness'.

Present/habitual: 'talks as if he knew' is technically correct but 'He talks as if he knows' is also accepted in informal usage.

'Milk' is uncountable → 'little/a little'. 'A little' means some; 'little' = hardly any. 'little' fits implying scarcity.