My shoulder hurt wickedly each time I put another full barrel on it, and my legs occasionally trembled as I was heading to the street. (Para. 2)
Meaning: Each time when I put another full barrel of trash on my shoulder, it hurt me badly, and sometimes my legs even shook as I was walking to the street.
wickedly: ad. badly, very intensely
The story is wickedly funny. 这故事非常有趣。
My back aches wickedly. 我的背痛得厉害。
tremble: vi. shake uncontrollably
He trembled with fear. 他害怕得发抖。
He felt the earth tremble under him. 他觉得脚下的大地在震动。
head to: go to
Which classroom are you heading to? 你到哪个教室去？