I'm too lazy to take out my winter clothes which I've already put away.
"I'm too lazy to take out my winter clothes which I've already put away.":
"I'm too lazy"=「私は~をするのには面倒くさくて」
"to take out my winter clothes"=「私の冬用の服を取り出すのに」
"which I've already put away"=「すでにしまい込んだ(服)」