负重

(lit. and fig.) to carry a heavy load / to carry a heavy burden

to bear / to carry (on one's back) / to turn one's back on / to be defeated / negative (math. etc)

to repeat / repetition / again / re- / classifier: layer

heavy / serious / to attach importance to

to endure humiliation as part of an important mission (idiom); to suffer in silence

seriously injured

weight training