opportunity Antonyms

remora tribulation trouble turnstile twaddler unlikelihood unluckiness woe laboriousness ill luck incommodiousness encirclement hypothyroidism monkey wrench bad luck crown of thorns trial trap tragedy reverse riddled saddling scalping septum setback snag sorrow spigot stopple strain stumbling-block suck suffering threat Akaba Aqaba disfunction matter of course foregone conclusion workload infarct bad trot hard luck packhorse rub of the green safety catch snarl up speed bump thorn in one's side stroke of bad luck