adjective, murk·i·er, murk·i·est.
dark, gloomy, and cheerless.
obscure or thick with mist, haze, etc., as the air.
vague; unclear; confused: a murky statement.
Origin: 1300–50; Middle English mirky. Related forms
cloudy, dusky, lowering, misty, hazy.
1, 2. bright, clear.
is a TOEFL word you need to know.
So is feasible. Does it mean: